Bolt head marking chart 6 The markings on the head face of a bolt can be confusing. A2-70 Stainless Steel alloy with 17-19% All Sizes 20,000 65,000 Min. 8 and above are made of low-carbon alloy steel or medium carbon steel and are generally called high-strength bolts after heat treatment (quenching and tempering), and the rest are generally called ordinary bolts. Bolts, Screws and Studs Low or medium carbon steel 1/4" - 1-1/2" 33,000 60,000 36,000 B70 / B100 Sep 26, 2023 · As with the metric fasteners, the imperial bolts are also marked with letters that denotes the manufacturer. Nuts are not required to be marked unless specified by the purchaser. Bolt Grade Markings and Strength Chart for US Bolts. If you still have questions not addressed in the chart, don't hesitate to contact us for help. Yield Strength (MPa) Min. Sometimes you can determine which set you need by the age or brand of whatever it is you are fixing. Grade Bolt Markings - Metric Steel Bolts Head Marking Grade/Specication Material Proof Load (MPa) Tensile Strength min (MPa) Yield Strength Nov 21, 2023 · Download PDFs of these Bolt Marking Charts; US Bolt Grades Chart with Strength Chart. The type of mark depends on the standard to which the bolt was manufactured. - (corrosion resistant) add "h" before dash number for drilled head and shank. Tensile Strength (psi) US Bolts 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 Grade 5 Bolt Grade Markings and Strength Chart Mechanical Properties Head Marking No Markings 3 Radial Lines 6 Radial Lines Stainless markings vary. 1 (See the chart to the right for dimensions of USS& SAE Flat Washers) Fender Washer Alma Bolt Company & Prime Fasteners 1-800-526-2200. bolt is a standard AN-type or a special-purpose bolt, and sometimes include the manufacturer. 8, and 12. nz 03 366 5590 . There are three main systems of bolt classification: SAE, Metric and ASTM. look no further then to the FASTENALL PDF Document . When nuts are machined from bar stock the nut must be additionally marked with the letter “B. Please note the bolt heads may also include the manufacturer's identification stamp, especially with high strength bolts. Flat Washer Flat Washer Dimensions per asme B18. Abbreviated OH or OV Pan A slightly rounded head with short vertical sides. Apr 10, 2021 · In fact, they’re the strongest of all the fasteners we’ve covered in our inch-series and metric bolt head marking blogs. 9 12. Title: Bolt Head Markings. Mudge Fasteners, Inc. pub Author: Admin Created Date: 6/1/2022 8:45:10 AM an bolt series add "c" before dash number for corrosion-resistance steel bolt. 6 (Mild Steel) Metric Class 8. TDS-005A 2-15-08. head markings add "dd" before dash number for aluminum alloy bolt. Fasteners bear all forms of markings on their heads, from number and letters, to shapes and hash marks. bolt identification and grade Bolt Head Markings A convenient chart to help you identify the material grade of an inch or metric dimension bolt. , “B8M”, applied to head. Grade Identification Markings for Carbon Steel Externally Threaded Fasteners 1. BYSA Lee Enfield manual, version 6. 8 BM 8. IMPERIAL SOCKET SCREWS. 5″ N. The below diagram shows examples of English and Metric bolt and nut markings. Dec 20, 2013 · Screw and Bolt Head Types – Identification Chart (Courtesy of BoltDepot. If it matters, that's a captive washer; it's not a flange-head bolt. 8 Class Q &T What Are Fastener Head Markings? Fastener head markings are symbols, numbers, or letters stamped onto the top of bolts or screws. bolt sizes Our suite of comprehensive technical tools is designed specifically to provide engineers, architects, and the construction industry with a one-stop shop for technical fastener information. The markings indicate the manufacturer, material used, and the bolt's tensile strength. Dec 10, 2005 · This bolt is metric. Most stainless s non- magnetic Head Marking 10. 9 Alloy steel, quenched and tempered The Bolt Grade Markings and Strength Chart is used to identify the strength and grade of different bolts. Thanks. 9 Grade and Material Grade 2 low or medium carbon Grade 5 Medium Cathon Steel, Quenched and Tempered Grade 8 Medium Carbon Alloy Steel, Quenched and Tempered Bolt Marking & Identification – Metric & UNC/UNF M BM 8. a. Let’s look at a few! It is typical to find British series bolts with letters stamped on the head like the picture above. A2-50 Stainless Steel alloy with 17-19% chromium and 8-13% 1/2" thru 85,000 92,000 120,000 nickel 1-1/2" Stainless markings vary. com . Sep 7, 2022 · 18-8 Stainless Steel Bolt . Class 8. 50 inch, inclusive for number of alloys in common use and intended for service applications requiring general corrosion resistance. PO Box 607 Rochester, IN 46975 Nut marking Under head PRODUCT TRADEMARK MARKINGS External O R OCtSS Cam-Tech Industries, Inc Bolt Grade Markings & Strength American Bolts Head Marking Grade or Class Material Nominal Size Range (inches) Mechanical Properties Proof Load (psi) Yield Strength Min. This specification covers the requirements for stainless steel bolts, hex cap screws, and stud bolts in imperial size 0. Material Markings Apr 10, 2021 · Learn More About Bolt Head Markings with Wilson-Garner. These six radial lines indicate that the bolt is a Grade 8 bolt. Abbreviated PN Truss An extra wide head with a rounded top. Some metric nuts also have the strength class number stamped on their face. Here are the markings that indicate Grade 2, Grade 5, Grade 8 & Structural Bolts. The different types of bolt heads include: Hex – the most common bolt head ; Domed – resists tampering; Bent – for non-linear configuration ; Square – enables a secure grip with a wrench or pliers This resource provides clear illustrations of different markings on Hex Head Bolts and Nuts. The markings vary from head to head as they are not universal. Grade 2 ASTM-A307 SAE-J429 Bolt Grade Markings and Strength Chart Head Marking Grade and Material Nominal Size Range (inches) Mechanical Properties Proof Load (psi) Min. Jun 21, 2023 · The different types of bolt heads. 8, 10. Bolts should not be separated from rifles in storage, especially where bolts bear different numbers to the rifles they are fitted to. com e. 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. These markings generally denote the material of which the bolt is made, whether the . Jun 9, 2022 · The number markings are engraved on the top or side of the bolt head. Metric bolts are a bit more straight forward, usually having their strength class number stamped right on the bolt head. The SAE marking system employs raised dashes on the bolt head to signify the bolt grade. Note: Some bolts share identical head identification and have significantly different strengths. In addition to the "BD" marking, the product may be marked with 6 radial lines 60° apart. Toll Free: 800-991-1280 Fax: 713-675-6066 Local: 713-675-0123 zerofast@zerofast. 25 inch to 1. Bolt Grades and Head Markings (Inch & Metric) Bolt Grades and Head Markings – US Inch and Metric Visit our online store for product availability Identification Grade Mark Specification Description Material Proof Load (psi) Yield Strength Min (psi) Tensile Strength Min (psi) SAE J429 Grade 5 ASTM A449 Bolts, Screws,Studs Medium Carbon Steel Marking Specification Material Bolt & Screw Size, Inches Min. I get the impression this is the metric "clock face system" but can't find any hard data on it. , “X” ( on head of bolts and screws and on one end of studs and stud 1. Or, we also talk about some metric head markings in this blog. 8 (Stainless Steel) (Structural) Metric B7 Studs Grade 316 (High Tensile) Whitworth, British Fine, UNC and UNF hex bolts. When nuts are machined from bar stock the nut must be additionally marked with the letter ‘B’. A. com. New Definition Bolt Head Markings Chart US Bolts Head Marking Grade and Material Nominal Size Range (inches) Mechanical Properties Proof Load (psi) Min. Button A low-profile rounded head Zero Products, Inc. com So if you are in need of a quick reference to bolt head markings look at the large images below. HOURS Monday-Thursday: 7am – 3:30pm Friday: 7am – 2pm Mar 22, 2019 · If you are like me and like to wrench on things, whether it's fixing a car or repairing the snowblower, you probably have a set of inch and metric wrenches. 219 Baywood. 9 strength level and require a manufacturer’s marking. HOURS Monday-Thursday: 7am – 3:30pm Friday: 7am – 2pm 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. 9. Found a good chart on fastener identification marks but I don't see the ones you specifically mention. This system uses two numbers separated by a dot expressed in Sex Bolts Sex bolts (a. They will indicate if the bolt is metric or imperial and the grade/class. 800. Fastener Guides - Bolt Grades & Head Markings | Fastener SuperStore | Bulk Industrial Fasteners Bolts, Screws, Studs 60,000 Bolts, Screws, Studs ASTM A307 Grades A&B 60,000 STANDARD BOLT IDENTIFICATION MARKINGS Identification Grade Mark Specification Fastener Description Material Nominal Size Range (in. 8 M BM 10. For fasteners that are designed to be counter sunk such as flat head screws, the fastener is measured from the point on the head where the surface of the material will be For a chart of fastener grades, head markings and mechanical properties, see US bolt head markings Metric bolt head markings 8. Home | Size / Thread Reference. Yield Strength (psi) Min. com ) Sep 7, 2023 · They show up as raised numbers or dashes. This nut will have a Proof Load Stress of 8 x 100 = 800 MPa In practice only standard threaded fasteners in the high tensile property classes, i. But first, you'll need to know the difference between standard (SAE) and metric fasteners. * Formulas that were used to construct the charts. The head of the bolt is usually hexagonal shape (sometimes square or circular) and is used to tighten or loosen the bolt. 100,000-chromium and 8-13% nickel 65,000 150,000 Typical Typical ' Stainless markings vary. 9 (Higher Tensile) Metric Grade 304 (Stainless Steel) Metric Grade 316 (Stainless Steel) Imperial SAE Grade 5 (High Tensile) Imperial SAE Grade 8 (Higher For fasteners where the head usually sits above the surface such as hex bolts and pan head screws, the measurement is from directly under the head to the end of the fastener. 36: 55: Metric Bolts: Marking on bolt head Bolt grade & Material Nominal bolt Size (mm) Mechanical Properties ; Proof Load (N/mm2) Minimum Yield Strength (N/mm2) Minimum Tensile Strength (N/mm2) 8. ISO 965-2: Limits: Charts for the allowed range of pitch, major and minor diameters for classes 6H and 6g. Tensile Strength B8 B8MA B8C B8T B8R B8S F593U ASTM & SAE Grade Markings for Steel Bolts and Screws 18 - 8 18 Chromium 8 Nickel ASTM A193 / A320 GR B8 CL-1 ASTM A193 / A320 GR B8M CL-1 ASTM A193 / A320 GR B8MA CL - 1A ASTM A193 GR B6 ASTM A193 GR B8C CL-1 ASTM Apr 10, 2021 · Here, we have a bolt head marking with the Wilson-Garner manufacturer identifier and six radial lines. Zero Products, Inc. 9 - Alloy Steel, quenched and tempered 830 940 1,040 - Class 8. These marks hold valuable information about the fastener and learning how to read them can help you decide if it’s the correct product for the job. Metric. 8 & 10. 9 (Higher Tensile) 0_ Metric Metric Grade 304 Class 8. 8 Bolt Marking & Identification — Metric & UNC/UNF 70 70 Metric Imperial Class 4. Threaded fasteners and rivets are identified by Air Force-Navy (AN), National Aircraft Standard (NAS), and Military Standard (MS For bolts and screws longer than 6 in. Bolts Screws Pins Washers Nuts Cable Chain Drop Forged & Turned Wire Hardware Alloy Socket Masonry Electrical Terminals B'laster Products Stainless markings vary. Grade 2 English Bolt Head Markings Chart US Bolts Head Marking Grade and Material Nominal Size Range (inches) Mechanical Properties Proof Load (psi) Min. 55: 70: 7/8″ to 1. Grade 1 requirements shall apply. Common metric classes are 5. The size of the head is dependent on the shank’s nominal diameter. The bolt grade markings are Manufacturer’s identification mark, e. Tip: See Bolt Depot's Grade Markings and Strength Chart for a more comprehensive chart of fastener grades, head Metric Bolt Head Markings. Check them out. Round A domed head. 9 also. 8 Medium carbon steel, quenched and tempered All sizes below 16mm: 580: 640. Metric bolt grades are known as “property class,” and are set by the International Standards Organization . 3. Hex Bolt Identification, Markings and Strength Chart. g. What Are These Numbers? Bolts are made at different strengths. Bolt head can have three important dimensions. Metric Socket Head Cap Screw Markings: Metric Fastener Markings: Knurl Pattern E12. How to identify grade 8 bolts? See the chart below. Headed Bolts bolt types are shown in table 7-12. Additonal information on bolts is located at the bottom of the webpage. txt) or read online for free. 8 (High Tensile) Metric Class 10. Abbreviated RH Hex A hexagonal head Abbreviated HH or HX Socket Cap A small cylindrical head using a socket drive. 9 Hex bolts, or hex cap plow-bolt track-bolt sems hex hex washer head socket head low head cap shoulder socket button head countersunk head left-hand right-hand minor Ø pitch Ø major Ø threads per inch (imperial) pitch thread length (metric) bolt length across flats across corners bolt head markings head marking strength and material bolt type standard metric 4. 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 Except for the very lowest grades metric nuts and bolts all carry identification markings which indicate their strength. When putting the rifle away for storage the bolt should be closed, the striker forward (“fired off”) and the safety catch on. thru 1" Min. 6, 8. DR650 clutch spring bolt. 1. AN standard steel bolts Largest range of all types of bolts and nuts, socket screws, washers, machine screws, rivets, screws, self-drillers, boat hardware, masonry fasteners. , “X” ( on head of bolts and screws and on one 6605 N. Aircraft bolts may be identified by code markings on the bolt heads. Page 8 of 40 ASTM F593 - Standard Specification for Stainless Steel Bolts, Hex Cap Screws, and Stud Bolts. A PDF document that shows the bolt head marking chart for various grades and sizes of bolts, screws, and studs. Very small fasteners may be exempt from marking requirements, and imperial socket screws often do not have head markings. Last edited by JohnZ; Sep 10, 2019 at 11:00 PM . com Bolt Depot - Bolt Grade Markings and Strength Chart - Free download as PDF File (. 9 M BM B7 A2 M BM 70 A4 M BM 70 BM BM Metric Class 4. (psi) Tensile Strength Min. Here, we offer a chart with different grades of bolts and their mechanical properties. Conversion Chart, DIN and ISO Equivalencies Cross reference DIN specifications to the equivalent ISO specifications. Oct 24, 2014 · Our Fastener Identification Markings Chart has a complete list of bolt grades with accompanying head markings. Ph: 713-462-3147 . In addition to the indicated grade marking, all grades, except A563 grades O, A and B, must be marked for manufacturer identification. Bolt head markings are a combination of letters, numbers, or both, which help identify the fastener. Par 7-34 . Manufacturer’s identification mark, e. Tensile Strength (MPa) Class 8. In addition to the indicated grade marking, all grades included in this Table must be marked for manufacturer identification. How do we specify the grades between each pattern and make sure you get the correct size? 1. This system assigns a number to the bolt that corresponds to its tensile strength. Note it's pretty easy to remember the bolt markings once you see them. When marked, the identification marking shall be the grade letter O, A or B. 8 SAE Grade 8 (High Tensile) (Higher Tensile) Metric Class 10. ANSI Hardware Guide Military, Aerospace Hardware Selection Guide. Bolt head styles reflect the bolt’s intended function while enabling the installation tool to grip the head. These markings provide information about the fastener’s grade, strength, and manufacturer. com) Flat, Oval, Pan, Truss, Round, Hex, Hex Washer, Slotted Hex Washer, Socket Cap, Button Heads Screw and Bolt Drive Types – Identification Chart (Courtesy of BoltDepot. They are set according to a system developed by the SAE. 4. Mating Screws Mating screws have a shoulder that matches the diameter of the sex bolts they are used with. Nov 16, 1990 · Head marking Markings that are physically applied onto a fastener and may be used to provide traceability to the manufacturer, material/grade, and heat or lot numbers of the fastener. e. The higher the numbers are, the stronger the material of the fastener is. Unlike the previously mentioned fasteners, imperial socket screws, which include both unified and BS, quite often do not have head markings at all, the occasional exception may be a manufacturers identification Dec 10, 2022 · silicon bronze bolt: 1/4″ to 3/4″ N. The bolt heads also have a code of normally two or three letters that indicate the manufacturer. Hardnesses are Brinell Hardness US Bolt Diameter and Thread Chart Our printable 'lay-over' sizing chart for identifying US bolt diameter and thread count. Compare the mechanical properties such as proof load, yield strength and tensile strength of different bolt classes and alloys. But what do they mean? In this video our fastener spe Feb 15, 2019 · A grade 8 bolt will have 6 radial lines on its head. On the head of each bolt there are two numbers which are separated by a decimal point. Hanger Bolts Sep 9, 2019 · Here's the Paragon bolt chart, separated into three segments; save and print each individual image as a standard full page, then combine them, and you'll have a readable copy of the chart. Call or Text: (951) 270-1360 Toll Free: (800) 634-0406 sales@mudgefasteners. com * Tolerance fields Charts – Per diameter and pitch. pdf), Text File (. Oct 28, 2024 · Good question. The manufacturer's unique symbol is engraved on the bolt head for traceability and quality assurance purposes. Common Bolt Head ID Markings . The Hex Head contains different markings which give information on the different grades of classes of steel that the bolts are made from. * Root radius Charts and formulas. x (non-corrosion resistant) Oct 20, 2024 · 316 stainless steel bolt head markings. This Fastener Identification Markings Chart shows the various marking requirements for most common grades of ASTM and SAE fasteners. bolts Atmospheric corrosion-resistant steel, quenched and tempered 1/2" - 1-1/2" 120,000 150,000 min 170,000 max 130,000 C33 / C38 Note: Manufacturer's identication mark are also stamped when applicable. Minimum tensile strength 125,000 PSI. Head Marking, Grade, Material, Nominal Size Range (inches) and Bolt Strength. Houston TX 77011. Metric class 8. At Portland Bolt, we understand your profession’s unique challenges and demands, which, is why we’ve developed a range of tools to streamline your workflows, enhance precision in information gathering Dec 13, 2024 · Bolt head markings allow you to visually identify bolt grades quickly and easily. sales@thenutplace. ” 3. a. Alloy Steel, quenched and tempered Metric Bolts: Head Marking Class and Material Nominal Size Range (mm) Mechanical Properties ; Proof Load (MPa) Min. Nov 5, 2019 · Head Markings Metric Bolt Class Mechanical Properties Proof Load (MPa) Min Yield (MPa) Min Tensile Strength (MPa) - Class 12. They are standardized by organizations like the American Society for Testing and Materials (ASTM) and SAE International. ASTM A193 Grade B8M Class I Regular Series and Heavy Series Symbol for identification of grade, i. 6 SAE Grade 5 (Mild steel) (High Tensile) Metric Imperial Class 8. All Grade BD products shall be marked "BD". 9 Sep 19, 2024 · A bolt can be divided into two parts: Bolt Head and Bolt Body. Gessner Houston, TX 77040-4015 . Metric socket heads are most commonly stocked in the Property Class 12. While hex heads are shown, grade markings apply equally to products with other head configurations. 7-36. , “X” ( on head of bolts and screws and on one end of studs and stud bolts). The most common SAE bolt grades are Grade 2, Grade 5, and Grade 8. Interested in learning a bit more about bolt and screw head markings? While this is currently our only blog on metric grades and head markings, we do have Aircraft Bolt Identification, Guide Table. 1, “Square and Hex Head Bolts and Screws Inch Series”. The dimensional requirements are contained in ANSI B18. They are: Size across the Flats Bolt Grades And Strength Chart. 2 Technical -> Bolt Head Markings Chart JavaScript seems to be disabled in your browser. IDENTIFICATION. Among them, bolt grade 8. Link Grade and Class . Bolt Head. 9 - Alloy Steel, quenched and tempered 970 1,100 1,220 - Class 10. The markings shown for all grades of A194 nuts are for cold formed and hot forged nuts. Metric socket head cap screws are offered in more than one strength level (unlike inch sizes that only come in one strength level). Additionally, low-grade bolts, such as Grade 2 bolts, typically do not have any markings. BOLT HEAD MARKINGS and Strength Standards -- UT-121. S. Tensile Strength (psi) 307A Low carbon steel 1/4" thru 4" N/A N/A 60,000 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" A countersunk head with a rounded top. If you want a painfully complete document on strength of bolts, different grades, SAE, metric, etc. bsa 1959 to 66 500 & 650 twins front drum hub; bsa 1967 to 70 650 & a75 front drum hub; bsa 1971 to 1973 a65, a70, a75 & b50gs front drum What are some common head markings on stainless steel bolts and screws? If you look at the head of a stainless steel fastener, you might see a marking stamped onto the surface. Yield Strength Min. Look at the threaded part of the bolt/setscrew and identify if it is a fine Zero Products, Inc. Find out how to identify the grade and material of US and metric bolts by their head markings. 8 - Medium carbon steel, quenched and tempered 580-600 640-660 800-830 A4-80 Stainless Bolt Head Markings sales@mainlandfasteners. For example, a grade 5 bolt has a tensile strength of 120,000 PSI, while a grade 8 bolt has a tensile strength of 150,000 PSI. The most common bolt grades are 8. 1, November 2018. Learn More About Metric Bolt and Screw Grades with Wilson-Garner. Their strength is indicated by markings on the head. Aircraft hardware is identified for use by its specification number or trade name. It provides information about the material and strength of the bolt, which is important for determining its suitability for specific applications. These bolts adhere to the SAE J429 Specifications, established by the Society of Automotive Engineers. Markings may be required by the referenced material specification, standards, federal legal requirements, or procurement and contractual requirements. SAE stands for Society of Automotive Engineers. In the chart below Oct 13, 2023 · Society of Automotive Engineers. The chart includes the grade mark, the material, the tensile strength, and the yield strength of each bolt type. 2. The most common strength marking system is the SAE grade system. HERE Although, it is possible the letters you mentioned may have been what the manufacturer of the bolt used to identify their bolts as in the early days of automobiles there were a lot of variances between manufacturer to manufacturer to bolt sizes, hardness and even threads Thus, for the bolt of property class 8,8 in the above example a nut of property class 8 is required. 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. 40: 55: Aluminum Grade 2024 Aluminum bolt: All sizes: N. And the image in the chart can also help to exhibit the grades of bolts with the identification marks on the bolt’s head as well as the hardness and strength of common grade bolts. property class 8,8 and above are required to be marked with the appropriate code. - - (alluminum alloy) add "a" after dash number for undrilled bolt. The SAE marking system uses raised dashes on the bolt head. These charts helps to identify the grades of bolts using the identification marks on the bolt's head along with the strength and hardness of common grade bolts. 16mm - 72mm : 600: 660: 830: Class 10. This sheet contains markings for both Imperial and Metric Bolts. Check if there are any head markings. Oct 20, 2024 · It is important to note that not all bolts will have head markings. Tensile Strength (psi) 307A Low carbon steel 1/4" thru 4" N/A N/A 60,000 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". Jan 24, 2021 · Download our bolt head markings chart to reference any time you need to figure out the grade of a bolt you're using or looking for. Head Markings: Metric Bolt Class: Mechanical Properties: Proof Load (MPa) Min Yield (MPa) Min Tensile Strength (MPa) Class 12. * Recommended Tolerance classes – Charts per tolerance quality and length of engagement. Interested in learning a bit more about bolt head markings? We give an overview of what bolt head markings mean and provide some more inch-series examples from SAE J429 in this blog. I have seen a couple of different marking systems for metric grades, but not this. Scroll the fastener head identification or go to the alphabetical link showing the first letter Although markings are shown on hex heads, grade markings apply equally to products with other head configurations. Mar 28, 2022 · The performance grades of bolts for steel structure connection are divided into more than 10 grades, such as 3. They are made from 17%–19% chromium and 8%–13% nickel alloy steel. co. 9, and 12. ASTM A 193 Grade B8M Class 1 Regular Series and Heavy Series X 67610 B 8 M Symbol for identification of grade, i. . Metric Bolt Grades Chart with Strength Chart. 21. Anything made in the United States prior to 1980 is probably not using metric fasteners, while most other parts of the world have never AN Bolt Selector Hex head aircraft bolts are made of high-strength type 4037 or 8740 alloy steel (type 8740 is most commonly used). ) This technical information is supplied as a courtesy. SAE Bolt Grades: The standards for bolt strength grades in the U. SAE bolt head markings use a series of raised dashes to communicate strength. barrel nuts or Chicago bolts) have a female thread and are used for through bolting applications where a head is desired on both sides of the joint. Written December 4, 2007 , modified October 24, 2014 2014-10-24 Head marking head mariing Taptlte Products Camcar Division Of Textron Inc 826 East Madison Street Belvidere, IL 00 00 head marking Torx Products Camcar Division Of Textron Inc Formerly: Indiana Metal Products Co. (psi) No Markings Grade 2 Low or Medium Carbon Steel 1/4” thru 3/4” 55,000 57,000 74,000 7/8” thru 1-1/2” 33,000 36,000 60,000 SAE bolts are widely utilized as the standard bolts for automotive, machinery, and OEM applications, particularly in North America. Similarly to US bolts available across the country, the markings on British bolts and screws can give you more information than you think. 2. Smith Brothers Services, LLC 3212 State Route 94 Suite 9 Franklin, NJ 07416 (973) 209-7569 sales@smithbrothersservices. k. A4-80 Stainless Although markings are shown on hex heads, grade markings apply equally to products with other head configurations. ISO Metric Hardware. Jan 21, 2022 · Headed bolts are required to be stamped on top of the head, while most rods and some bent bolts are required to be stamped on one end. The inch series also includes the ASTM standard, which includes: A307 Grade A and Grade B ; A193 Grade B7 ; A354 Grade BC and Grade BD ; Metric Bolt Head Markings bsa spoke kits . The bolts are centerless ground and threaded after heat treatment. 8, 8. 8 10. 307A 307B A325 A449 BC BD A490 H - K G 9 for additional technical information, contact fastenal engineering at engineer@fastenal. jtq irgvw cqpavo uiojm zmfxtzw iwxeg ycpysgc eabte ggnsj azek