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This chart 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. Please note the bolt heads may also include the manufacturer's identification stamp, especially with high strength bolts.
Yield Strength: The maximum load at which a material exhibits a specific permanent deformation. Proof Load: An axial tensile load which the product must withstand without evidence of any permanent set. 1MPa = 1N/mm 2 = 145 pounds/inch 2. Shop for US Bolts. Shop for Metric Bolts.
• Stamping of F1554 and A307 Grade C bolts is a supplemental requirement while color coding is required. • Although markings are shown on hex heads, grade markings apply equally to products with other head configurations. • All Grade BD products shall be marked “BD”. In addition to the “BD” marking, the product may be
SAE J429 covers the mechanical and material requirements for inch series fasteners used in automotive and related industries in sizes to 1-1/2” inclusive. Below is a basic summary of the most common grades.
Grade 2 Cap Screws are manufactured in accordance with SAE J429 and must meet hardness requirements of 80-100 HRb for diameters up to and including 3/4” and 70-100 HRb for sizes over 3/4” diameter.
The properties involved in bolt grade classification normally include proof load, tensile strength, yield strength, elongation, area reduction, surface hardness, and core hardness. However, it is important to note that not all standards encompass all of these properties.
Helps to identify grades of bolts along with proving proof load, tensile strength, yield strength and hardness. Allen Wrench Size Chart & Conversion Table Provides dimensions for Imperial and Metric Allen Wrenches; long arm and short arm.
