ASTM A307 Plain and Hardened Washers

Washers used in conjunction with ASTM A307 Hex Bolts and Stud Bolts are crucial fasteners accessories. While ASTM A307 itself does not specify washers, the washers used for general-purpose, non-critical bolting are typically plain flat washers that comply with dimensional standards like ASME B18.22.1. Their primary application is to distribute the bolt's load evenly over a wider surface area, reducing the risk of material deformation or damage to the clamped components. In certain structural or larger diameter A307 assemblies, a hardened washer may be used to prevent embedment of the bolt head or nut into the material. Zeron Fasteners manufactures and supplies a complete range of washers, including plain steel and hardened types, often coated with zinc or hot-dip galvanized finishes to ensure reliable performance and compatibility with A307 low-carbon steel fasteners.

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