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.

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 …

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 …

Metric Bolt Strength: Minimum, Ultimate Tensile & Proof Loads - Metric Minimum ultimate tensile and proof loads for metric bolts with coarse or fine threads.

ASTM F1852 provides strength comparable to that of ASTM A325 bolts, while ASTM F2280 provides strength comparable to that of ASTM A490 bolts. The chart below summarizes the …

This chart detailed bolt strength requirements by grade. All specifications below are per ASTM. For more information on fasteners, visit our Fastener Learning Hub.

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 …

LIABILITY – Information in this document pertaining to strength or proper working load or performance of materials, tools and equipment has been compiled by the manufacturer for the …

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.

Additonal information on bolts is located at the bottom of the webpage. Note: Some bolts share identical head identification and have significantly different strengths.