Bolt Grade Chart. 8, 10. Jul 2025 Bolt Grade Markings and Strength Chart The Bolt Gra

8, 10. Jul 2025 Bolt Grade Markings and Strength Chart The Bolt Grade Markings and Strength Chart is used to identify the strength and grade of different bolts. Grade 2, 5, and 8 are the most common grades of fasteners according to the Society of Automotive Engineers standard. Additionally, it explains key terms such as tensile strength, yield strength, and proof load. Dec 14, 2021 · Have any questions? Talk with us directly using LiveChat. Bolt Strength Requirements by Grade At Birmingham Fastener, we aim to provide you with the knowledge and tools for your project. Dec 18, 2024 · Learn about the different grades of bolts, including Grade 2, Grade 5, Grade 8, and high-strength alloy bolts. It's an M12 bolt with 1. 9 vs 10. com - 1-866-337-9888 US Bolts Nominal Mechanical Properties i Grade and Size - Head Marking Proof Min. view Difference Between a4-70 vs a4-80, a4 70 bolt torque and shear strength The document outlines the mechanical properties of different bolt grades including their material, hardness range, proof load, tensile strength and yield strength. Numerous organizations have set standards for the various metal grades. 019 Goh Depak Bal Grade Markings and Stength Chart olt Depot com fastener shopping Il made easy Bolt Grade Markings and Strength Chart Your Account info@boltdepot. Thread Condition: Damaged, dirty, or rusty threads increase friction and alter the actual clamping force. 8). Learn how to identify the grades of bolts using the head markings and the strength and hardness of common grade bolts. Discover the differences between US and metric grades, their applications, and how to choose the right fasteners for your project. ASTM, SAE and ISO Grade Markings for Steel Fasteners Download a complimentary PDF of our Fastener Markings chart. 8 (High Tensile) Metric Class 10. Common Nuts Markings Nuts are also coded by grade. Higher bolt grades are made of stronger alloy steels and have higher minimum requirements for metrics like hardness, proof load and tensile strength. Bolt Grades and Head Markings – US Inch and Metric Visit our online store for product availability Steel Bolts - SAE Grades SAE steel bolts - grades ranging grade 1 to 8. Click to find your size and best price of A4-70 Stainless Steel Hex Bolt in India, Widest stock of Grade A4 70 Stud Bolt . Jun 9, 2022 · The SAE J429 standard has specific requirements for bolts, screws, studs, sems, and U-bolts up to 1-1/2" in diameter. 2 - proof and tensile strength. Thread Length Formula: For bolts 6” and shorter – twice the diameter plus 1⁄4” – (2D + 1⁄4”) Longer than 6” – twice the diameter plus 1⁄2” – (2D + 1⁄2”) When bolts are short for formula thread length, thread will extend as close to head or shoulder as practical. Compare the proof load, yield strength and tensile strength of different bolt classes and grades. 8 (Stainless Steel) (Structural) Metric B7 Studs Here are the markings that indicate Grade 2, Grade 5, Grade 8 & Structural Bolts. Bolt Grade Markings & Strength American Bolts Metric Bolts Tensile Strength: The maximum load in tension (pulling apart) which a material can withstand before breaking or fracturing. Bolt grades are typically determined by two main standards: Diameters and bolt circles for standard ASME B16. Includes PDF, PNG, and JPG file formats Dec 19, 2022 · Here’s an in-depth guide to the most common grades of fasteners under the BSI (British Standard Institute) system. Manufacturer and supplier of Grade 8. The ISO 10. xlsx Steel Bolts - SAE Grades SAE steel bolts - grades ranging grade 1 to 8. Make informed decisions and ensure the success of your mechanical engineering projects. The tension is 85% of the proof load. 9, 8. Torque values for various grades and diameters of fasteners. When nuts are machined from bar stock the nut must be additionally marked with the letter “B. Always replace an old bolt with the proper replacement. Tensile Strength (psi). Metric Classes Imperial Grades Metric Classes Jul 14, 2025 · Learn how to choose the right bolt grades with our simple comparison guide. Make sure you have the right grade for your project. 4 days ago · Find the perfect square head bolt size chart. Find out the bolt grade, material, size and mechanical properties of US and metric bolts. Bolt strength can be divided into ordinary grade and high strength grade. The right bolt grade for a particular application depends on a number of factors, including the load that the bolt will be subjected to, the environment in which the bolt will be used, and the cost of the bolt. Discover their material properties, applications, and how to select the right bolt for your project. These grades ensure that bolts meet the specific demands of different applications. Contact American Fastener with any questions or for a custom quote. These will be addressed in this article. 6 SAE Grade 5 (Mild steel) (High Tensile) Metric Imperial Class 8. The grades are typically indicated by markings engraved on Dec 11, 2025 · The chart below organizes bolt grades, their head identification marks, and strength values because knowing how to read them helps you choose hardware that’s right for your job. bolt-nut_ident. Grades of Bolts - Bolt Grade Marking Chart, p2 Grades of Bolts - Bolt Grade Marking Chart, p3 Tensile Strength: The resistance of a material to breaking under tension Yield Strength: The stress at which a speci c amount of deformation is produced Proof Load: An axial tensile load which the product must stand without evidence of any Bolt Grade Markings & Strength American Bolts Metric Bolts Tensile Strength: The maximum load in tension (pulling apart) which a material can withstand before breaking or fracturing. 28 TSI or 62,220 PSI The la er is the more commonly used measurement. 9 may be used as preloaded bolts. 6. The Bolt Grade Markings and Strength Chart is used to identify the strength and grade of different bolts. Grade 2 bolts are cheap but not very strong, grade 8 bolts are the strongest and most expensive, and grade 5 bolts are the most common. Grade 8 150,000 psi Imperial Bolts: High Tensile (Imperial) Grade 5 120,000 psi High Tensile (Imperial) Grade 9 160,000 psi The tensile strength is measured in tons per square inch or 1000’s of pounds per square inch. 4 days ago · Need a reliable b7 stud bolt chart? Find ASTM A193 Grade B7 specs, suppliers, and pricing. Find charts for inch steel bolts and metric bolts with different specifications and materials. Grades of Bolts - Bolt Grade Marking Chart, p2 Grades of Bolts - Bolt Grade Marking Chart, p3 Tensile Strength: The resistance of a material to breaking under tension Yield Strength: The stress at which a speci c amount of deformation is produced Proof Load: An axial tensile load which the product must stand without evidence of any Mar 28, 2022 · The strength grade of the bolt is divided according to the hardness, force, and yield of bolt raw materials. 8, A4-80, A2-70), what their head markings mean, and how their proof load, yield strength, and tensile strength compare. Additonal information on bolts is located at the bottom of the webpage. Learn how to tell what grade bolt you are using SAE steel bolts - grades ranging grade 1 to 8. 6, 4. Stay safe and secure with quality fasteners from Lightning Bolt Supply. Our complete guide covers bolt grades, thread pitch, strength, sizes, and torque for metric and imperial bolts, helping distributors and wholesalers select the right products for their projects. Check out our list and learn how to identify common bolt grades. Jun 12, 2024 · Fastener Performance Class or Grade A metal's grade/ class is established by a combination of numbers, letters, or both, and is based on its chemical composition, physical characteristics and mechanical properties. RECOMMENDED TORQUE VALUES FOR SAE GRADE 2, GRADE 5 AND GRADE 8 CAP SCREWS & BOLTS Mechanical Properties Hardness Rockwell Grade Marking Material & Treatment Nominal Size (in. 8 SAE Grade 8 (High Tensile) (Higher Tensile) Metric Class 10. Jun 9, 2024 · Do you know what bolt grades to use whenever working on your car or truck. 1 (4) the design shear resistance Fv,Rd should only be used where the bolts are used in holes with nominal clearances not exceeding those for normal holes as specified in EN 1090-2 'Requirements for the execution of steel structures'. View bolt length charts, read product comparisons, and find answers to your questions about fasteners. Compare specs, materials, and suppliers. Understand metric vs SAE grades, strength ratings, and avoid mistakes Boltmasters For all your Fasteners Bolt Marking & Identification — Metric & UNC/UNF 70 70 Metric Imperial Class 4. When looking at the mechanical requirements of bolts it appears that a grade A325 and SAE J429 Grade 5 are identical as do the grade A490 and the SAE J429 Grade 8. 9 (Higher Tensile) 0_ Metric Metric Grade 304 Class 8. Nov 19, 2014 · Bolt grades are easy to determine and important to recognize for the right application. It provides information about the material and strength of the bolt, which is important for determining its suitability for specific applications. 9, or stainless steel, this guide covers it all. We would like to show you a description here but the site won’t allow us. Information on the strength requirements of the different grades of construction fasteners. 8 are used—plus A2-70 and A4-80 stainless. Metric Class 8. Yield Min, Tensile Material Range Load ‘Strength Strength (inches) (psi) (psi Tensile Strength: The maximum load in tension (pulling apart) which a material can withstand before breaking or fracturing. 9 rating means it's high-strength, so it can handle some serious torque and weight. Note: Some bolts share identical head identification and have significantly different strengths. Understand strength ratings, material types, & applications. Bolt grades are typically determined by two main standards: Bolts by Grade and Torque, this is a Reference page for using the right bolt based on grade. Refer to the charts to find the ideal tightening torque. 9 and 12. Learn how to tell what grade bolt you are using Steel Bolts - SAE Grades SAE steel bolts - grades ranging grade 1 to 8. Notice the Grade 5 has a much smaller head configuration and a shorter shank than the A325 structural bolt. Tensile Strength: The maximum load in tension (pulling apart) which a material can withstand before breaking or fracturing. The chart below summarizes some of the more common grades and classes available here at Fastener Mart. 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. According to EN1993-1-8 § 3. Bolts by Grade and Torque, this is a Reference page for using the right bolt based on grade. Available in a range of sizes from M2 to M42 and din 933. g. They determine the maximum amount of load the bolt can handle as well as the method that can be used for tightening the bolt. Stainless steel bolt strength chart. Metric Bolt Grade Markings & Steel Strength Chart (with US Equivalents) This guide explains common metric bolt classes (12. It includes tables listing the head markings, material, size ranges, proof loads, tensile strengths, yield strengths, and hardness values for various grades of bolts according to standards like SAE J429 and ASTM. 9 also. The maximum load at which a material exhibits a specific permanent deformation. 9) withstand higher torque than lower grades (Grade 5, 8. 9 vs 8. Grades Of Bolts Chart - And the image in the chart can also help to exhibit the grades of bolts with the identification marks on. 8, and grade 10. Discover essential torque specifications with our comprehensive Bolt Torque Chart. 9. 9 (Higher Tensile) Metric Grade 304 (Stainless Steel) Metric Grade 316 (Stainless Steel) BM BM B7 This chart doesn’t go too deep, just enough to quickly compare different materials and classes. Which is why we lined the data up so you can see the difference between imperial and metric. Metric class 8. Head marking, grade, material, nominal size range (inches) and bolt strength. Nov 28, 2023 · Gain a solid understanding of bolt weight and strength grades with our comprehensive table. 1 day ago · Bolt Grade: Higher-grade bolts (Grade 8, 10. Hex Bolt Identification, Markings and Strength Chart Table Guide Hardware Menu Hex Bolt Identification, Markings and Strength Chart Table Guide Hex Bolt Identification, Markings and Strength Chart. In general, the higher the grade number, the stronger the bolt. Grade 4. Jan 27, 2023 · Understand what bolt grade and bolt marking mean using this bolt grade chart. US Bolts Head Marking Grade and Material Nominal Size Range (inches) Mechanical Properties Proof Load (psi) Min. Replace a graded fastener with same or higher grade (don't replace a Grade 8 fastener with a Grade 5 or 2). ) Proof Yield Tensile Elong % Load Strength Strength Min Min (ksi) Min (ksi) Min (ksi) TORQUES LISTED ARE SUGGESTED VALUES FOR PARTS THAT CARRY RESIDUAL OILS FROM Nov 21, 2023 · Explore essential bolt grades with our comprehensive chart for builders, detailing US and metric strengths, and easy PDF downloads. We will introduce the bolt grades chart as a valuable tool for quick and easy reference when selecting fasteners. 8 and 10. The document provides a detailed chart of bolt grade markings and their corresponding mechanical properties for both US and metric bolts. If you think a bolt is a bolt, you are heading for disaster or worse Sep 16, 2021 · Standard Fastener Grades (Top of bolt head) This chart outlines the common grades of bolts we carry at Global Certified Fasteners. If in doubt, ask a professional for assistance. 8, 5. Sep 18, 2024 · Learn the essentials of bolt and nut grades, including SAE, ISO, and ASTM standards. Jan 8, 1993 · Only bolt assemblies of classes 8. Nov 5, 2019 · Learn what metric bolt grades mean, how to read head markings, and where 12. Check out this informative chart detailing the tensile strength of metric bolts. Bolts meeting SAE J429 standards have radial lines engraved on the bolt head. Find recommended torque values and fastener guides at Dultmeier Sales. 8 & 10. Nov 21, 2023 · Explore essential bolt grades with our comprehensive chart for builders, detailing US and metric strengths, and easy PDF downloads. Aug 12, 2025 · Comprehensive bolt grade charts covering identification markings, strength ratings, and environmental effects. Standard thread pitch explanations and a chart showing number of threads per inch for National Coarse, National Fine and 8 Pitch threads. Click to explore verified vendors with customizable options and fast delivery. A bolt grades chart is a practical reference guide that summarizes the properties and applications of different bolt grades. 8, 8. 25mm thread pitch and 90mm length - pretty substantial. A guide to selecting the perfect bolt for your project. Click to explore verified options and make informed choices today. This chart displays values for lightly oiled threads. 8 wedge style expansion anchor, Sleeve, Toggle Bolts and L Shaped Anchor Bolts in all sizes and dimensions. 8 bolt? Surprisingly, they are closer than you would think. 5 flanges - 1/4 to 24 inches - Class 150 to 2500. 6, Grade 8. SAE bolt grades indicate the strength of the bolt. e. Find recommended tightening specs by diameter and grade, including common sizes like M8 and M12. What are Bolt Grades Bolt grades are a standardized way of categorizing bolts based on their mechanical properties, such as tensile strength, yield strength, and hardness. Maximum tightening torques for coarse threaded metric bolts. Interested in ln bolt size chart? Explore our trusted assortment and find the perfect fit for your needs! We would like to show you a description here but the site won’t allow us. Jun 30, 2025 · Explore our bolt torque chart for metric bolts. The grading of steel serves to ca Compare stainless steel bolt classes (A2-50, A2-70, A4-80, Class 100): head markings, yield and tensile strength, and PSI/MPa. Order high quality Hex Bolts from ITA Fasteners at the reasonable price. It includes information on proof load, minimum yield strength, and minimum tensile strength for various grades and classes of bolts. For fastening bolts used in different products and applications, bolts of different grades are required to suit the uses. Print and hang in your workshop. Lubrication: A lubricated bolt requires significantly less torque to achieve the same clamping force as a dry bolt. Yield Strength (psi) Min. Grade A is a low tensile nut and is used with grade 2 bolts; grade B is used with a Grade 5 bolt and grade C with a Grade 5 bolt. Here, we'll offer more details on different grades of bolts and their applications to help you find the best-suited grade for your projects. The markings shown for all grades of A194 nuts are for cold formed and hot forged nuts. The document provides information on bolt grade markings for inch and metric steel bolts. Tensile and yield strength for A1, A2, A3, A4, A5, C1, C3, C4 and F1 grade classes. Bolt & Nut Australia | Suppliers of Fasteners & Kits Online Commercial hexagon nuts are made to SAE J995. Whether you need Grade 8, Class 12. Download a printable stainless chart (PDF). MECHANICAL OR PHYSICAL PROPERTIES OF BOLTS, SCREWS AND STUDS (ISO 898-1) Nov 24, 2023 · From SAE to ASTM to ISO, learn all about bolt grades, tensile strengths, and suitable applications. Oct 22, 2025 · Very useful chart for metric thread sizes, pipe threads, bolt grades, and bolt torque specifications. Our constantly expanding Fastener Learning Hub is full of information and insights for a variety of industries. Each bolt grade has an ideal tightening torque for maximum clamping force without breaking. Pick the right fastener for your project. On standard nuts, Grade 2 are not marked, but Grades 5 and 8 are using a clock marking system. Get a quote for Hex Anchor Bolts, Hex Head Bolts and all kinds of Bolts or just call our sales team now. xlsx Bolt Grades - Head Marking and Rod End Reference Guide Bolts and Rod Ends Specification Data Discover essential torque specifications with our comprehensive Bolt Torque Chart. 8, 9. 8 Anchor Bolt in India, Buy Class 8. ” Check out our grade compatibility chart for those times when you can’t figure out which grade of bolt, nut and washer are compatible with each other. Bolt grades are alphanumeric designations that categorize bolts based on their mechanical properties. Learn how to read bolt grade markings. Includes printable chart. Jan 5, 2026 · This article provides the information for choosing the correct bolt tightening torque for standard bolt sizes with Chart + Calculator. We are often asked how strong is a stainless bolt compared to a class 8. 9 We would like to show you a description here but the site won’t allow us. 9, 10. Special markings on screw heads and nuts identify the fastener's grade. Metric steel bolts, screws and studs - proof and tensile strength.

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