Metric bolt head markings

com. Tensile strength is the amount of pull the bolt can withstand before breaking. 2x15. If the bolt has only 3 or 6 lines pointing toward the center of the head, this identifies the bolt as SAE (Society of Automotive Engineers). ▽; Fastener Descriptions. – metric screw thread with tolerance Sk6 for studs DIN 939 . Step 3 - Measure Length of Bolt. The bolt is made from low or medium carbon steel: Applications: Designed to keep the bolt from turning when a nut is being tightened. 9 bolts. Material. 75 Mar 22, 2020 · Bolt Grade Markings Jh Posted on March 22, 2020 by Fattana Fastener head markings decoded fasteners bolt grades strength aircraft hardware by ron alexander metric system specifications fastenal fasteners bolt grades strength makes (specifically Nissan and Mazda), the metric bolts have strength markings like 6, 8, 10. Two other common symbols that are included on metric parts are the "S" and the 3 designations. A metric bolt with a 12 for the first digit, for example, would have a tensile strength of 174,000 PSI (12x100=1,200N/mm2 x 145=174,000psi). I get the impression this is the metric "clock face system" but can't find any hard data on it. Does anyone know what these markings on the head of a bolt mean. Yield Strength (psi) Min. 5, 1. Generally available in #2 - 1/2" sizes and metric Bolt Grades & Head Markings cont. ▽; Information. These markings indicate how strong the bolt is they call this tensile strength. Determining Bolt Grades & Understanding Head Markings The Nut and Bolt Solution Series. 93 METRIC COACH SCREWS. If the bolt head is marked with 8. Thompson. 8 (High Tensile) Metric Class 10. Inch Pitch - Threads per Inch Metric Pitch - Threads per Millimeter Metric Fasteners can also have Extra Fine Pitch Thread HEAD MARKINGS - INCH HEAD MARKINGS - METRIC XX GRADE 5 CAP SCREW GRADE 5 NUT GRADE 8 NUT XX GRADE 8 CAP SCREW XX 8. COM Live Support Specialists Available Via Phone & Chat METRIC PARTS Proof Load - The amount of tensile (pull apart) stress that a bolt must be able to withstand without permanent deformation. A Grade 5 bolt can be identified by the three lines. 126 Mill Street Rockford IL 61101 Bolt & Screw Head Markings and What They Mean Home / Article / Bolt & Screw Head Markings and What They Mean If you’ve ever spent any time looking at the heads of different fasteners, you’ve probably noticed that there are a wide variety of markings that may be stamped onto a fastener head. 9 and 12. A wide variety of stainless steel bolt head markings options are available to you, such as certification. 75 $ 35 . 15-15- 3. Material, Nominal Size Range (mm), Mechanical Properties. 8 is a common grade of metric fastener that is similar in I came across some square head lag bolts where the only marking is a U  Use the Mudge Fasteners bolt head markings chart to identify which types of bolts you need. A325, A490), and markings to classify the type of bolt (Type 1 or Type 3). ASTM A325 is an ASTM International standard for heavy hex structural bolts, titled Standard Specification for Structural Bolts, Steel, Heat Treated, 120/105 ksi Minimum Tensile Strength. Since the terms "bolt" and "screw" were in use before the advent of easily-produced helix To convert a metric bolt to one with U. Bolt Grade Markings and Strength Chart. , “B8”, applied to head. , an M6 screw  You can tell by the markings on the head, but I'm going to show you an even better one. tops of several hex-head Metric Hex Head Bolt Markings,Metric Hex Head Bolt Markings wholesaler,China Metric Hex Head Bolt Markings manufacturer,Metric Hex Head Bolt Markings exporter,Metric Hex Head Bolt Markings supplier,Metric Hex Head Bolt Markings factory in Dongxin Bolt & Nut. Besides, the head markings’ most reputable manufacturers also stamp their trademark in the bolt… Hi there - enjoying a delicious egg nog and pondering what these Honda bolt head markings mean. 11. 9 and socket head cap screws 8. ASTM A 193 Grade B8 Class 2 The markings shown for all grades of A194 nuts are for cold formed and hot forged nuts. Henry F. Manufacture’s identification mark, e. 8. g. Hex Head Cap Screws: Hex head cap screws offer an added washer face to the bolt head which is lacking on a hex bolt. This is almost as high as they get and is about the equivalent to a grade 8 SAE or USS bolt. A metric bolt with no markings on the head has a tensile strength of 429MPa (mega pascals) or 60,900 psi. 15 Feb 2019 the grade, or strength, of a bolt by looking at the markings on its head. THREAD PITCH - INCH THREAD PITCH - METRIC Thread Pitch = The distance between threads. IE strength etc. 9 Alloy Steel, Quenched and The below listed Table is a listing of some of the more common Bolt Head Markings. 9 (socket products). Usually these marks indicate the bolt's manufacturer. Metric thread size (M8=8 mm) by the designation on bolt head and by the surface treatment. These are designed to engage with the tool used to tighten them. The three principal parts of a bolt are the head , grip , and threads , as shown below. This is a large grade 8 bolt and there you can see the markings. markings on threaded fasteners By: dallashermanson Many bolts that you come across have various markings on the bolt head, such as alpha numeric characters and/or a number of radial lines. 25 × 25 A B C Major thread diameter in millimeter (C) Length in millimeters (A) Distance between threads in millimeters (B) Bolt Dimensions Metric Grade Markings Torque Values Applications ENGINE 163-224 cc 270-459 cc Name Size Torque Value Size Torque Value Nm ft-lb Nm ft-lb Connecting REQUIRED MARKINGS ASTM A 193 Grade B8 Class 1 Regular Series and Heavy Series. The heads of different fasteners can be stamped with a wide variety of markings onto the head. Fasteners smaller than M5, and those with slotted or recessed heads, whatever their diameter, need not be marked. No markings on the bolt head indicate a low carbon steel bolt with a tensile strength 64,000psi or less. 8 is obligatory for hexagon socket head cap screws with. FASTENERSUPERSTORE. 8 (equivalent to SAE grade 5), or no markings (equivalent to SAE grade 2). US Bolts: Head Marking Grade and Material Nominal Size Range (inches) Shop for Metric Bolts. 9. " Metric bolts list measurements in millimeters. 8. 9 Class 12. 45 cm²,  Metric (millimeter) bolt and nut substitutions will be allowed in shall be sufficiently identified; and (iii) designation of said records as exempt under the Statute is. Today, only two systems, inch-pound and metric, are predominate in most industrial nations. For example, M10 or M10-6g, by default, specifies M10 x 1. 14 Oct 2016 Many, but not all bolts, are stamped with either a number (metric bolts) or a Besides, the head markings' most reputable manufacturers also  thread types and head types, knowing what the markings mean and what the Loctite reduces the chance of lateral movement of the bolt head during hardware grade of Metric 8. 9 as a “flat” head design and to call a plow bolt that is made to the heavy duty head design specified by the Caterpillar standard 1E44 as a “domed” head design. AM. Remove stripped, rusted, and painted nuts and bolts with these Metric bolt extractor sockets. So, for example, a grade 5 bolt will only have 3 radial lines on its head. 9 Socket Head Cap Screw Material Low/Medium Carbon Steel Low/Medium Carbon Steel Heat Treated Medium Carbon Steel Heat Treated Alloy Steel Heat Treated Alloy Steel Heat Treated The illustration below, depicts typical and common aircraft ( AN and NAS ) type bolts and their identifying markings. BSW Mild Steel. Bolt Grades and Head Markings; Bolt & Cap Screw Dimensions; Metric, SAE, USS Metric Studs 62MM Metric Cylinder Head and Manifold Metric Studs Qty (10) 11993. 8 Metric Studs Metric Screws Drain Plugs and Gaskets Body Clips . Metric Bolt Grades—Metric grades are set according to rules set by the ISO  The "M" designation for metric screws indicates the nominal outer diameter of the screw thread, in millimetres (e. What I pay more attention to is the grade of the bolt in hardness. A head with no markings is Grade 2, one with 3 lines spaced 120 degrees is Grade 5, and 6 lines spaced at 60 degree intervals is Grade 8. Metric Size Bolt Identification Example. 15 Feb 2013 This grading, which is typically stamped on the head of the bolt, has the R- This grading can withstand 40. Bolt Marking & Identification – Metric & UNC/UNF M BM 8. In addition to these markings, most reputable bolt manufacturers will also stamp their trademark in the head of the bolt, which allows for easy identification and accountability. Anything else is non-domestic. Yield Strength (psi / MPa) Min. Often one will find "extra" marks on a bolt head--marks in addition to those shown below. These look like a lowercase "b", or a pig snout (or is it two "D"s back to back?). 0 x 110mm Hex Cap Screws, Metric Class 8. Jan 21, 2019 · Metric bolts stainless steel hex cap markings fasteners bolts s bolt head markings and what they mean wilson garner pany bolt grade markings and strength chart Socket Head Cap Screws 1960 Series Stainless Steel Socket Head Cap Screws Low Head Series Shoulder Screws Flat Head Socket Screws Alloy/ Stainless Button Head Cap Screws Alloy/ Stainless Use in parts too thin for standard height heads and where clear-ance is limited Tool and die industry standards; also replace costly special parts-shafts Bolt Stretching and Tensile Stress - Tensile stress and Hooke's Law; Bolt Torque Calculator - Calculate required bolt torque; ISO 724 - Metric Threads - Dimensions of metric threads according ISO 724; Lubricated Bolts and Reduced Torque - Lubrication effect on bolt tension and torque; Metric Bolts - Head and Wrench Sizes - ANSI/SO, DIN and JIS A chart showing metric and stardard bolt markings and their associated standard torque values. 25 or 1, and 10mm can be 1. Metric has two strength levels, property classes 12. Link here for an explanation of what the numbers mean. Making sure your This is represented by the last number in a metric bolt's designation. Tensile Strength (psi / MPa) US Bolts No Markings Grade 2 Low or medium carbon steel 1/4 thru 3/4 Cheat Guide Chart – Bolts, Screws, Washers, Nuts, Drive Charts Working on a project and trying to find the name of a special bolt type? We have the charts to help you identify the many different types of bolts and screws for just about any project. Head Markings. Everything on your engine should be 7 minus the head bolts crank bolt cam bolt, and flywheel bolts. bolts can be identified by their head markings. This number when multiplied by 100 indicates the Proof Load Stress of the nut in MPa. Hi all I have a left of field question. Equivalent to metric A2 Stainless Steel. Great service and great prices, shop our wholesale fastener inventory today! China Bolt Head Marking, China Bolt Head Marking Suppliers and Manufacturers Directory - Source a Large Selection of Bolt Head Marking Products at bolt m8 wafer head,flat head bolts countersunk,hammer head bolts from China Alibaba. What is number on the head of a bolt mean? Wiki User 2009-12-17 21:25:41. 9 etc etc. Hex bolts will have 10. 8 or SAE grade 5 and use a suitable washer and a locking . Bolt Grades & Head Markings Many of our bolt styles are available in various grade and class options with each grade containing distinctive head markings. These markings on this head indicate, these 1-2-3-4-5-6 slashes that you see here, those slashes indicate that that's a grade 8 bolt. AS 1111. Print this page . In Part 3 of our series on head markings, we’re going to talk about metric fasteners. 8 CLASS 8. The bolt heads are all marked with three th Figure 3-13. Yes there's heaps of that on the net and I know enough about those to get by. com offers 160 stainless steel bolt head markings products. 9 would be a hex head capscrew 20-mm in The ASTM requires structural bolts to be distinctively marked. B. 9 M BM B7 A2 M BM 70 A4 M BM 70 BM BM Metric Class 4. Metric Commercial. Head Marking, Class and. ܡܒܢ. 8,10. Apr 11, 2018 · Bolts are assigned various grades and these grades are usually stamped on the bolt's head for easy referral. A Grade 5  The SAE marking system uses raised dashes on the bolt head to indicate strength. 9) 4-5 Hex Jam 10 M Machine Screws 13-14 Metric Flat 12 Metric Pitch Gauge 15 Metric Threaded Rod 11 METRICS 1-15 N Nuts 9-11 Nylon Lock 9 P Phillips Oval Head 13 Phillips Pan Head 14 Pipe Plug 8 S Slotted Pan Head 14 Slotted/Castellated Hex Nut 10 Socket Head Cap Screws (Class 12. Scroll the fastener head identification or go to the alphabetical link showing the first letter The number of lines on the bolt head is 2 less than the actual grade. They do not show the JIS grading which is what I'm looking for. 25 or 1, each is a different count. 9 is generally 150,000 and grade 12. English bolts are categorized by grade and metric by strength class. I hat ehow teh head diameter is changed. 9 Hex Flange Bolt Zinc Plate Default metric fastener thread pitch. 67608 Stud, Stain. Decipher what those numbers and hieroglphics on the head of bolt are tryiong to tell you. 9 bolt, the 9 tells the user that the yield strength of the bolt is approximately 90% of the first number: 1,000 MPa. 1, “Square and Hex Head Bolts and Screws Inch Series”. For further information, see the appropriate standard. Half of these are aerospace fasteners. A bolt with a low grade two is often manufactured with low or medium carbon steel. Patent and Trademark Office Fastener Insignia Register Active Insignias Oct 30, 2014 Status: Name: Insignia: Rockford Bolt & Steel Co. Atlanta Rod & Manufacturing, Inc. e. 8 refers to the tensile strength which is generally 116,000 psi, grade 10. 9 Alloy Steel, quenched and tempered 830 940 1040 Class 12. If it matters, that's a captive washer; it's not a flange-head bolt. Bolt Head/Wrench Size; Recommended Bolt Torque; Standard Thread Length for Bolts; Thread Pitch Table (Coarse and Fine) Metric Bolt Diameter and Thread Chart Our printable 'lay-over' sizing chart for identifying Common METRIC Steel Bolts Identification Mark 4. P. This permits higher torque to be applied with less. 8 Medium carbon steel, quenched and tempered 580-600 640-660 800-830 Class 10. A Grade 2 bolt is the softest grade of steel bolts. The Boeing 747 is made of over six million parts. Bolt head markings usually accomplish two things: they identify both the manufacturer of the bolt and the standard to which the bolt was made. Hi there, I need to replace a bolt and all I got is a triangle sign on the bolt head with 6 lines ae shown on my attachment. 6 (Mild Steel) Metric Class 8. Hex head bolts M5 and larger must have the property class marked on the head of the bolt, either in raised or depressed lettering. I am not talking about the lines on the heads of bolts that indicate what Grade the fastener is. There are no head markings for a Grade 2 Hex Head Bolt. Proof Loads and Tensile Stress - Metric Hexagon Bolts. Metric Bolts. A bolt commonly shears where its head meets the threads. 8 Class 8. Connecting Rod Bolt M7 12 9 M8 18 13 Cylinder Head Bolt M8 24… Bolt Markings and Grades Bolt/Screw Thread Lengths Bolt/Screw Thread Pitches Finishes/Plating Options Flat Washer Dimensions Hex Cap Screw Dimensions Inch and Metric Materials, Mechanical Properties and Markings Machine, Sheet Metal, and Thread Cutting/Thread Forming/Thread Rolling Screws Technical Information Socket Head Cap Screw Thread Lengths “World’s Leading Manufacturer of Speciality Industrial Fasteners” More than a 25,000 products currently being exported to 70 countries across 6 continents. This is the start of a simple page for common bolt head markings. 713-462-3147) Grade 5 ASTM-A449 SAE-J429 Size Hardness Rockwell Proof Load Yield Strength Tensile Strength min. TDS-005A 2-15-08 bolt identification and grade Metric System & Specifications Throughout history, people have been trying to limit the number of measurement systems. Bel-Metric : 10x1. stainless steel bolts grades and markings | BOLT HEAD MARKINGS and Strength Standards -- UT-121 Coach Screws Stud Bolt Stainless Steel Bolts Garage Tools Car Repair Washers Wood And Metal Charts More information ASTM A325 Bolts. 5. Property Class, Head Marking, Size Range (mm), Minimum Proof Strength (106 Pa), Minimum  27 Mar 2020 In our final installment, we talk about metric parts, how they differ from inch series parts, and the metric head markings required by ISO 898-1. Hex Bolt Head Markings Welcome to ABP A. 12. If the bolt has numbers on the head then its metric. Screw Points. Standard Metric Bolt Dimensions and Grades Torque Values Applications (Engine) Name Size (163-224cc) Nm Ft-lb. Minimum Tensile Strength (psi) Jan 29, 2012 · What does generate a ton of discussion, among restorers, are those "number 8" bolt head markings. --Bolt head markings. What do those slashes and numbers generally mean on a hex bolt? It’s very simple, generally speaking on a clear zinc plated bolt you will notice 3 hash markings on the head. 8 for 12. Hex bolts, or hex cap screws, are used in machin- ery and construction. The standard metric fastener thread series for general purpose threaded components is the M thread profile and the coarse pitch thread series. 8 to 45 metric tonnes per 6. Items 1 - 20 of 6115 M16-2. Metric vs. Highly visible markings on the bolt extractor sockets for quick socket selection. Flange bolts virtually eliminate the need for washers because the area under the bolt head is wider and creates a larger area for even distribution of pressure. Thus, for the bolt of property class 8,8 in the above example a nut of property class 8 is required. Metric Bolt Grade Markings. S. U. The type of mark depends on the standard to which the bolt was manufactured. Carriage Bolt: Round Head, Short Neck Properties; Description: A round head bolt with a short, square shoulder under the head, and a unified thread pitch. I was going to install a set of ARP later (which I know have ARP on them), but what are "KXV" ?? I believe the stock head bolts are marked "SPS". I’m writing this from North America so I’m very well used to the ASTM A325 ratings for bolts and will primarily using those as a reference. ASMC Industrial offers the best selection of industrial bolt and nut fasteners. 8 BM 8. Numbers represent metric threads and. VAA. 9 this does not mean grade 8,10 or 12. ) This technical information is supplied as a courtesy. Metric Chart Lag Screw Pilot Hole Diameters Platings & Finishes Solar Panel Maintenance Standards Organizations Technical FAQ Thread Pitch Charts Videos Bolts use a wide variety of head designs, as do screws. This makes determining the pitch more difficult, as an 8mm bolt can be 1. ASTM A 193 About Fastener Materials Stainless Steel, 18-8 Stainless, Steel, Bolt Grade, Grade 2, Grade 5, Grade 8, Alloy Steel, Silicon Bronze, Brass, Zinc Plating, Hot Dip Galvanizing, Chrome Contact Us Smarter than dragging your knuckles across engine blocks, this Metric Universal Wrench Set features a 15 degree offset that gives you both leverage and space when torquing close to flat surfaces, while a specially designed box end distributes torque evenly across bolt head and nut, helping to prevent rounded corners with every turn. They vary by year and there are several variations. Standard thread stainless bolts are rated as 18-8 and have roughly the same yield and tensile strength as a Grade 5 bolt. 6 Class 5. When nuts are machined from bar stock the nut must be additionally marked with the letter ‘B’. Grade 2 ASTM-A307 SAE-J429 (Call us for specifications. 25 JIS Small Head Bolts - License Plate Fasteners Flange Bolts 10. It is made of medium carbon steel, quenched and tempered. 8, 8. This sometimes results in a clearance problem when a bolt needs to Take for example, the history of the Phillips screw:This cross drive screw story starts when Henry Phillips purchased a crude form of a cruciform-recessed screw head concept from an Oregon inventor named J. All-Pro Threaded neither employs nor maintains an engineering or technica l staff, and All-Pro is merely supplying certain Bolt Marking & Identification – Metric & UNC/UNF M BM 8. Fully threaded hex bolts are also known as tap bolts. 9 is a Socket Head Cap Screw, rather than a Hex Head  22 Nov 2013 Bolts with no head markings at all are referred to as Grade 2. Bolt Type. An alphanumerical designation to indicate the standard grade of either inch or metric fasteners. It is a metric thread (M12) 100mm long and is bright coloured (I would normally call it zinc) Jun 01, 2009 · For example, a metric bolt might have an "8. The F3125 specification is a consolidation and replacement of six ASTM standards, including; A325, A325M, A490, A490M, F1852, and F2280. The number after the period is the Yield strength of the bolt. Feb 16, 2004 · After pulling the valve covers and checking around the head near the exhaust, I noticed that my head bolts have "KXV" on the center. Markings on Hex Bolt Heads. Bolts come in several configurations for their application and specification variances. These numbers or markings  Marking. Bolt – head on one end, threads on other end, used with a nut Most commonly used in the bulk production of bolts, screws, the metric thread designation (M). In addition to the mandatory markings, certain manufacturers may include additional markings to distinguish them from others. We’ve got everything you need for any type of job or project. 9 (equivalent to SAE grade 8), 8. A metric bolt marked 8. ) Mechanical Properties Proof Load (psi) Yield Strength Min (psi) Tensile Strength Min (psi) No Grade Mark SAE J429Grade 1 Bolts, Screws, Studs Low or Medium Carbon Steel 1/4 thru 1-1/2 33,000 Our metric grade 10. Smith Brothers Services on: Bolt Head Markings. The shear strength of a metal bolt is approximately 0. The equivalent U. 8, 10. 9 with thread diameter d> 5mm, where the shape of the screw always allows it – preferably on the head. Medium Carbon Steel  IS 4218( Part 3 ): 1999 ISO General purpose metric screw do The designation system for property classes of bolts, screws and studs is shown in table 1. 25mm: – Has a shank diameter of 6 millimeters. Icon Legend. For example, metric hex cap screws are generally manufactured to one of the three bolts will have a metric property class designation stamped on the head. 8 X* 10. To minimize confusion, bolt head markings are unchanged and the designation A325 is retained as a grade name within the new standard. New Zealand Standard. com US Bolt Diameter and Thread Chart Our printable 'lay-over' sizing chart for identifying US bolt diameter and thread count. There are no markings on the head. Australian Standard. If you do not see what you are looking for or need more information, please contact us we will be happy   Many metric bolts denote the use of metric measurements with an "M" at the start of the bolt designation, such as "M9x1. A grade 8 bolt will have 6 radial lines on its head. Technical Info · Bolt Grades and Head Markings · Bolt & Cap Screw Dimensions · Threads Per Inch Reference Table. 5 thread pitch, measuring 20mm long and made of Class (grade) 8. Can be used with a nut, or in a tapped hole. 8 has a tensile strength of 830MPa or 120,350 psi. We also supply hex flange nuts that work in tandem with our hex flange bolts. The strength and type of steel used in a bolt is supposed to be indicated by a raised mark on the head of the bolt. Video 1: Determining Bolt Grade and Head Markings Steel Bolts - Metric Grades Steel Bolts - SAE Grades For metric bolts strength is according ISO 898 Mechanical properties of fasteners made of carbon steel and alloy steel described by "property classes" with designations 4. The SAE marking standard starts with grade 2, indicated by a bolt head with no The strength grade of a metric bolt, known as its property class, consists of two  55 Contant Avenue. If you have questions about a bolt head marking or specification, do not hesitate to Contact Us via our electronic form or call us at 877-844-8595. Steel 67623 B 8 X Symbol for identification of grade, i. 8, 9. Screw HTS; 22. 9 Class 10. A metric size bolt that is identified as: - 6mm x 30mm x 1. Notice that the 12. Also, on the head should be the These numbers or markings indicate their minimum strength or, technically speaking, their property class. Nov 22, 2013 · Stainless steel bolts are usually made with a steel alloy that contains up to 19 percent chromium and 13 percent nickel. Phillips (1890 to 1958), a U. Besides using metric measurements, a metric bolt uses the distance between the threads rather than the thread pitch, used in Apr 28, 2009 · markings. Any Bolt WITHOUT Markings Shall Be Considered To Be Of The Most Inferior Grade - Unless Its A2 and A4 stainless steel bolt head stamps Guide To The Maximum Torque Wrench Settings To Be Used On The Most Popular Metric Sizes. 8 steel. These values are from the Fastenall PDF or other web resources on metric bolts and fasteners. The dimensional requirements are contained in ANSI B18. 6 times its tensile strength. If you poke around the web you will see many different values for bolt torques. Bolt Marking and Torque Standards . 19. I'm used to the current international markings - lines, or letters/numbers representing material and hardness. It is a metric thread (M12) 100mm long and is bright coloured (I would normally call it zinc) It has the following markings B D2 M or a W cheers The other bolt is shorter, black and has an 'x' and 8. You can stock up on nuts, bolts and washers. 4 Dec 2007 @Dale- 8. Hexagon Head. With the metric bolts the higher the number, the higher the STANDARD BOLT IDENTIFICATION MARKINGS Identification Grade Mark Specification Fastener Description Material Nominal Size Range (in. 97 Marking. Additonal information on bolts is located at the bottom of the webpage. About 0% of these are Laser Marking Machines. 9 or 12. The only domestic head markings are LE, n, and a solid triangle. FASTENER SUPERSTORE FASTENER GUIDE (866) 688-2500 | WWW. 15 Jan 2014 Imperial to Metric conversion sizes. The SAE marking standard starts with grade 2, indicated by a bolt head with no markings whatsoever. These links only show the american bolt grading (6 radial dashes for grade 8 for example) or the metric 8. Figure 3-13 shows the. You will find threaded rod and all kinds of metric, USS and SAE fasteners. Bolt Grade Markings Head Markings. Aug 08, 2018 · Fasteners bear all forms of markings on their heads, from number and letters, to shapes and hash marks. Alibaba. This is the pressure that is required to ultimately stretch the bolt into permanent deformation. These bolt heads (not the bolt diameter) are also smaller when compared to a bolt of the same diameter with the 8. – Has a distance of 1. We see bolts with a 9, or a 7, perhaps even a 10 stamped in the head. Lodi, NJ 07644. Imperial to Metric conversion sizes. But what do they mean? In this video our fastener specialist covers several more common head For the 10. For me buying metric in thestates drives me nuts. Standard headed fasteners, both inch and metric, are required to have a grade or property class marking on the head if it has been heat treated. which they are manufactured. Size (270-459cc) Nm Ft-lb. This is again in the "EZ Read" format so those that are tired of looking at blurry and fuzzy charts can quickly determine the grade of bolts. Fasteners, which play a critical role in the structural integrity and longevity of aircraft, include Aerospace Bolts, Aerospace Rivets, and Aerospace Screws & Studs. Link Grade and Class . In 1951, A325 bolts were recognized as equivalent to a hot driven ASTM A141 rivet. A bolt is a type of threaded hardware fastener that is used to position two workpieces in specific relation to each other. Results 1 - 20 of 345 Metric Stainless A2 70 Hex Cap Screw, DIN 931 / 933 - (A2-70 is also referenced as 18-8 and 304 stainless steel) Most bolts are stamped with either a number (metric bolts) or a series of lines ( American bolts also known as fractional bolts). Hex Head Bolt & Nut Metric Course  Hex bolts, or hex cap screws, are used in machinery and construction. 8 (High Tensile) How strong is that bolt? In the case of hex head bolts, most of them come with markings. Cheers Is something I never really thought about, but will (now you mentioned it). 8 Class 10. Hex Head Cap Screws 1-5 Hex Head Class (10. 8 Hex Bolt M10 x 1. Jul 09, 2009 · Determining Bolt Grade and Head Markings with Northeast Fasteners on NutsandBolts. 9 (Higher Tensile) Metric Grade 304 (Stainless Steel) Metric Grade 316 (Stainless Steel) Imperial SAE Grade 5 (High Tensile) Imperial SAE Grade 8 (Higher Added 1-14-12. The corresponding code for nuts is a single number and is derived from the left hand number of the property class of the bolt, screw and stud. U-Bolt-It is a leading distributor and manufacturer of high-quality metric grade 10. 8 Zinc Plated Steel Hex Cap Screws (also called hex head cap screws, hex bolt, or hex  Metric Cup Head Square Neck Bolts. When marked, the identification marking shall be the grade letter O, A or B. Standard Metric Bolt Dimensions and Grades Metric - M8- 1. is marked on the head. 9 Alloy Steel, quenched and tempered 970 1100 1220 A2 Stainle Identification with the manufacturer’s mark and the property class is mandatory for hexagon screws 3. JIS (Japanese) Metric Hex Head - Class 10. Basics: Bolt Markings. 9 on a metric bolt indicates the hardness (or load, tensile strength, and hardness) of the bolt. 20 Aug 2017 Head. Caution: Don’t substitute 8. Aug 01, 2017 · How to Read Aerospace Bolt Head Markings. ISO 10642 Fasteners of the same designation, including product grade, property class. This is expressed in a metric number like 1. Was wondering if anyone k EZ Read Hex Bolt Torque Chart - Metric Another in the series of EZ Read Metric Bolt Chart. 6 X* 5. Updated 6-2-17. I already have a massive bolt collection from old mitsubishi's so it's usually ont a problem. The yield strength of the bolts is 940 and the tensile strength is 1040 MPa. Some bolt heads instead lock the bolt in place, so that it does not move and a tool is only needed for the nut end. AS 2451. Metric Hexagon Bolts - Dimensions. 9 bolts meet ASTM A324 grade BD and SAE J429, grade 8 standards. I’ve included a couple of metric classes in the table below for reference. Typically the diameter of a metric bolt is preceded by a capital M to designate metric. Established in 1994, we have been supplying fasteners to various industries, particularly to the automotive, construction, manufacturing and electronics industries. Identifying bolt grades and head markings for US grades 2, 5 and 8. If you have ever looked a metric hex bolt you might notice the markings 8. 8, or 10. Browse Bolts in the Fastenal catalog including Hex Bolt,Hex Cap Screw,Round Head Bolt,Slotted Head Hex Bolt,Socket Cap Screw,Square Head Bolt,Carriage Bolt,Plow Bolt,Elevator Bolt,Hex Flange Screw,12 Point Flange Screw,Flange Bolt,Button Socket Cap S Other available Grade 2 bolts include finished hex head-ASTM A307 and heavy hex head- ASTM A-307 Grade B. So far, have replaced the metric bolt I pulled with the bolt I pulled, but one day I might find your info is very usefull. 8, 5. bolt strength markings. 9 strength markings. 25 threads per 1 mm of length. 8 which I take is a metric high tensile. 8 is also 20 – 50% less expensive. -grade bolt might have three or five dashed lines on its face. As with any system, the metric system has also been changing and several modifications have been devised to match the progress of Screws are marked on the top of their heads, the exceptions being small (under about 1/4"), slotted and recessed head fasteners where there is insufficient room for head markings. Metric bolts have numbers, standard bolts have little lines, and rusty bolts… good luck. Hex Bolt Identification, Markings and Strength Chart Table Guide. 2. I see a lot of the latter around the engine crank case. D. For metric M5 and larger, the property class and manufacturer’s I. Metric bolts are a bit more straight forward, usually having their strength class number stamped right on the bolt head. Suzuki, at least as recently as 2009, has provided a table of standard bolt torques in their motorcycle service manuals that refer to markings on the heads of metric bolts. They don't have the typical grade marks on the head like a metric bolt would (8. Note: Some bolts share identical head identification and have significantly different strengths. , has been manufacturing anchor bolts, embeds, headed bolts and construction fasteners to customer specifications since 1981. Get all your Whitworth tools, BSC, British Cycle, British Standard Fine, BSF, King Dick, Everest & Koken parts from British Tools & Fasteners. com has the best deals and lowest prices on Taiwan Bolt Head Markings Note: In 2016, ASTM A490 was officially withdrawn and replaced by ASTM F3125, in which A490 now becomes a grade under the F3125 specification. 8 ratings. Tensile  Metric steel bolts, screws and studs - proof and tensile strength. current ISO metric screw thread system includes a coarse. 9 M X* Product Specification Class 4. We’ve already covered manufacturers’ head markings and fastener standards in Part 1. 9 bolt has an approximate yield strength of 900 MPa (940 MPa by specification). Metric Head Markings. This represents grade 5 which carries a tensile strength of 120,000 psi. You can tell by the markings on the head, but I'm going to show you an even better one. Nominal Size Range (Inches) Mechanical Properties. Metric bolt dimensions; 41. 5") is omitted, it specifies coarse pitch threads. 10. slashes represent standard threads (the greater the number 10. 6 to 12. Since the length of the bolt is the last number in a metric measurement, you should measure for it last. Back ASTM Standards Bolt Head Markings Bolt Head Size Chart Catalogs Fastener Expert Blog Fastener Glossary Imperial vs. Yield Strength (MPa), Min. 25 millimeters between its threads. – Pairing screws and nuts. 8 is about 30% weaker. Bolt extractor sockets have a specialized internal design to grab and grip fasteners for quick, straightforward removal. See The tables below gives the head markings and some of the most commonly-needed information concerning the bolts. Common bolt heads include hex, slotted hex washer, and socket cap. Bolt Head Markings Jun 15, 2016 · Bolt manufacturers use a variety of methods for marking the classifications of their products. Metric. This references 1. Common to see metric bolts with numerical markings. Diameter and length are identified in millimeters. 8 Consumer Reports and shopping results for Taiwan Bolt Head Markings from mySimon. SWAN. Metric grades 8. stainless steel bolts grades and markings | recession fasteners 101 metric vs sae bolts can be Screw Type and Head Chart - Comes In Handy For DIYers! 20 Oct 2000 20-10-02. Titanium hex head cap screws provide tighter dimensional tolerances over hex bolts. With an imperial bolt the more lines you have the higher the tensile the stronger the bolt. The flanges on the tower sections in a large horizontal axis wind turbine are joined by a hundred or so large bolts. mySimon. Class 8. Hexagon Head  Metric bolt head markings. Tensile Strength (psi) No Markings Grade 2 Low or medium carbon steel 1/4 thru 3/4 55,000 57,000 74,000 Over 3/4 thru 1-1/2 33,000 36,000 60,000 3 Radial Lines Thread Identification Chart (Metric – Coarse/Fine) A screw thread in conformity with this International Standard is designated by the letter M followed by the values of the nominal diameter and of the pitch expressed in millimetres separated by the sign x. So I don't index - fastener handbook product description section page forward 9-10 head marking 1 11-13 nut marking 13 standard bolt product ranges 2 14-15 iso metric 14 MULWARK Premium Master 3/8, 1/4, 1/2 in. If there are zero markings on the bolt head, it is usually because the bolt in question is of the lowest grade. Grade or Class. 9) 6 Socket Head abrasives, bolts, nuts, washers, socket screws, screws, threaded rod, masonry construction, stainless fasteners, drills, rivets, silicone and sealants, nails, hardware Bolt Grade Markings and Strength Metric Mechanical Properties Head Markings Range Grade or Class Material Nominal Size (Inches) Proof Load (psi) Minimum Yield Strength (psi) Minimum Tensile Strength (psi) 8. Many metric automotive bolts are stamped with numbers creating a lot of confusion as to the actual grade (hardness) of the bolt. (psi) 1/4”-1” R C 25-34 85,000 92,000 120,000 Grade 8 ASTM Fastener Identifi cation Markings: ASTM, SAE, ISO Identifi cation Grade Mark Specifi cation Fastener Description Material Nominal Size Range (in. 8 10. This is a grade 8 hex cap screw. 9 and 8. ​Metric bolt head markings. 9 X* or 12. Apr 24, 2017 · Many metric bolts denote the use of metric measurements with an "M" at the start of the bolt designation, such as "M9x1. 9" stamped on its head while a standard U. 9 is generally 175,000 psi. Proof Load (MPa), Min. These are "soft bolts," commonly referred to in mechanical engineering circles as a Grade Two or Three bolt. These markings on this it can tarnish over time. 8 Medium Carbon Steel, Quenched and Tempered All Sizes thru 1-1/2 85,000 92,000 120,000 10. Acimet. Metric parts. Bolt Grade Markings and Strength Chart Mechanical Properties Head Marking Grade and Material Nominal Size Range (inch / mm) Proof Load (psi / MPa) Min. Grade 5 is heat-treated. Hex Bolt Identification, Markings and Strength Chart. Fasteners have special markings not only on the screw head portions but also on the nuts. 8" or a "10. Feb 21, 2020 · They can come in any head form and finish, but the most common are hex-head cap screws (think Allen bolts), and usually they are black finished rather than shiny zinc or chromate-plated. Width Across Flats for Metric Bolts. BOLT HEAD MARKINGS and Strength Standards -- UT-121. Minimum Yield Strength (psi). Therefore, a bolt with 3 lines and LE on the head is a domestic grade 5; six lines with TH is a non-domestic grade 8. Nuts are also marked. The property class is marked on the bolt head, as is (usually) the manufacturer’s name or abbreviation. 9 1 2. Tensile Strength. The grade 8. Proof Load (psi). 8 M BM 10. Start from right below the head, including only the shank, and measure to the tip. 8 Aug 2018 In this video our fastener specialist covers several more common head markings on bolts and what they can tell you about the fastener. com Bolt Grade Markings and Strength Chart US Bolts Head Marking Grade and Material Nominal Size Range (inches) Mechanical Properties Proof Load (psi) Min. Nuts are not required to be marked unless specified by the purchaser. Head Markings Metric Bolt Class Mechanical Properties Proof Load (MPa) Min Yield (MPa) Min Tensile Strength (MPa) Class 8. Previous Next. threads the strength must be considered. Bolt Head Markings. S. Grade 2 bolts are stocked in a full range of sizes. Screw HTS A205 Pan Head. A Short Guide To Metric Nuts and Bolts Answers to the most Frequently Asked Questions Standard and Fine Pitch Th reads How to identify nut and bolt strength grades How nut and bolt strength grades compare Maximum Tightening Torques Why specifi ed torque is sometimes lower than the maximum Spanner Sizes Versus Bolt / Nut thread size Apr 20, 2019 · If the bolt has lines on the head its standard or imperial. ,10. In 1987, head marking requirements changed from requiring no grade identification to requiring a ‘307A’ marking on the head in addition to the manufacturer’s identification. , “X” (on head of bolts and screws and on one end of studs and studs-bolts). The premium metric bolts used in the most critical stress areas are Grade 12. The early bikes used the biggest number 8, up to late `69/early `70; some bikes had a mixture of both. Bolt with "10" on Button Head Socket Cap Screws Metric ( Coarse Thread) Flat Head Socket Cap Screws USS (Coarse Thread) Flat Head Socket Cap Screws SAE (Fine Thread) Metric Flat Head Socket Cap Screws; Socket Head Cap Screws USS (Coarse Thread) Socket Head Cap Screws SAE (Fine Thread) Socket Head Cap Screws Metric; Oval Head Phillips Self-Tapping Screws Stainless British Tools & Fasteners sells British sized tools, nuts, bolts, taps and dies for English cars and motorcycles. It’s very simple, generally speaking on a clear zinc plated bolt you will notice 3 hash markings on the head. Fastener Identification Markings Grade Radial Bolt Markings Material Nominal Size Diameter/Inches Proof Load psi Tensile Strength minimum psi Yield Strength minimum psi Grade 2 No Radial Lines Low or Medium Carbon Steel 1/4" to 3/4" 55,000 74,000 57,000 Over 3/4" thru 1 1/2" 33,000 60,000 36,000 Grade 5 3 Radial Lines Medium Carbon Steel If you do not see what you are looking for or need more information, please contact us we will be happy to help you! I recently purchased bolts from a dealership but need to verify bolt quality. bolt, hex head drilled, diff. 6, 4. 9 etc) Is there a chart I can use to identify this? Thanks for any help MATERIAL CODES GRADE MARKING REQUIRED MARKINGS ASTM A 193 Grade B8 Class 1 Regular Series and Heavy Series. Nominal Size Range Metric Bolts. Bayou City Bolt thinks of bolts and cuts as cutting-edge technology. Mar 22, 2019 · If your project was manufactured in the US in the 1980s or 90s, you may see both inch and metric, which may drive you crazy unless you learn a bit about head markings. Drive Hex Bit Socket Set Automotive,Bike,Motorcycle& ATV | SAE & Metric S2 Steel Allen Head Bit & High Torque Strengthened CR-V Socket 4. One thing I have wondered about is sometimes guys will replace OEM bolts with a much tougher aftermarket bolt. Fastener Identification Marking For Bolts. businessman from Portland, Oregon, has the honor of having the Phillips head screw and… The shear strength of a bolt is a measurement of the minimum amount of force needed to break the bolt into two pieces. Metric fasteners use pitch instead of counts, there is standard, fine and extra or super fine. – Is 30 millimeters long from the bottom of the head to the end of the shank. 6 out of 5 stars 144 $35. nickel ms9440-9459 steel iaw ams6304 pin straight, headless ms9486 steel iaw ams5132 bolt, hex head drilled ~ 1 hole ms9501-9508 a286 iaw ams5731 bolt, hex head, drilled ~ 6 holes ms9583-9591 a286 iaw ams5731 bolt, hex head ms9631-9639 dimensional data and technical information shown on the fastenerdata website is in the public domain and has not been acquired through the standards agencies, it has been completed and compiled by fastenerdata and is for guidance only; where discrepancies are found they are subject to change without notice. SAE. We can help you design an outdoor shade system for the long, hot summer. It is a blank head. threaded bolt has no markings and a tensile strength of 60,000 psi. Tensile strength is is the maximum amount of stress a bolt can endure from being stretched or pulled until it fails. fastenerdata makes no warranties or representations regarding the accuracy and validity Beranda › allen bolt grade chart › bolt grade chart › bolt grade chart pdf › bolt torque chart grade 8 › hex bolt grade chart › metric bolt grade chart › nut bolt grade chart › shear bolt grade chart › stainless bolt grade chart › stainless steel bolt grade chart ASTM A325 Specifications Technical Menu Posted on July 1st, 2015 by vapro. Industry practice is to call a # 3 head plow bolt that is made to the dimensional requirements of ASME B18. is the leading manufacturer of stainless steel fasteners in Thailand facilitating a production capacity of over 6,000 metric tonnes per year. Head Marking. Example: Class 8. These screws are best used for applications that need a high clamping force with easy access. Threaded full length studs; hex nuts; hex head bolts; double end studs; tap end  A4 refers to metric 316. 5 x 20 This is a hex head bolt with a diameter of 10mm, a 1. Oct 29, 2013 · You identify grade by looking at the head of the bolt. A manufacturer's mark is required on metric M5 or larger  28 Apr 2009 markings. 8 to 12. Common Bolt Head ID Markings . This rule for bolt length holds true for most types, including cheese, hex, pan, socket, button, and low socket head types. 9, this is a metric bolt and the diameter, head, length and thread pitch is measured in mm. Screws and nuts for high an low temperatures The yield stress ratio according to the designation of the property class and Minimum ultimate tensile loads3) – ISO metric (fine) threads ISO 898 / 1. These bolt head markings include the manufacturer’s mark, the grade of bolt (ex. Metric stainless bolts are rated as A-2 and are rated slightly under the standard metric 8. If metric thread pitch designation (e. These numbers do not give us any insight as to the size or hardness of the bolt. By Mark Zimmerman. See common head markings for hex bolt grade differences. Identification of BS American Bolt head markings; 31. Thus, the 10. Fastener manufacturers product identification starts with the manufacturer's symbol marked on the head, all high-grade fastener product contains the manufacturers mark along with the material grade. 25 or . Download our guide here. Specific example: M8 pressure plate bolts have a 9 on them. A grade 2 bolt made of low-carbon steel has a tensile strength of 64,000 pounds per square inch or less. A Grade 8 bolt can be identified by the six lines. 8 X* 8. bolts_sizes. Radial lines, such those used to mark SAE grades, are never used on metric bolts. Bolt Grade Markings and Strength Chart. Class 50, 70 and 80 designate increasingly higher metric strength levels. High visibility markings; Rugged chromium Many, but not all bolts, are stamped with either a number (metric bolts) or a series of lines (fractional or “American” bolts) indicating their minimum strength or, more technically, their property class. I have coffee cans full of SAE and smaller drawers full of metrics, but see no markings on my metrics (have every type SAE markings tho). The following markings are the primary indicators used on our parts. 8 CAP SCREW The bolt’s head also tells us its origin. , " x 1. Marking of property classes ≥ 8. " Metric bolts list measurements in  Head Marking. Accessories n what not should be 7 as well. 30 Jul 2019 ISO metric countersunk socket head screws PC 10. For instance, 10 x 110, 10. From the April 2004 issue of Motorcycle Cruiser magazine. 9 Metric Nuts Metric Washers Allen Head Fasteners Small Wrench JIS Bolts 8. Leads me to wonder if the lower grade or less strong bolt was there on purpose so that the bolt would bend or give before something more important does, and if replacing with a much higher grade bolt is a bad idea. A gold color zinc plated bolt has 6 hash markings on the head this represents grade 8 which carry a tensile strength of 150,000 psi. metric bolt head markings

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