Brighton Best's 5/8 in. F436 Plain Flat Washer provides a dependable bearing surface for structural fastening systems where load distribution and dimensional consistency matter. The ASTM F436 specification identifies this type of washer for use with structural bolting, making it well suited for steel-to-steel connections, fabrication work, construction assemblies, and heavy-duty repair applications. Hardened steel construction provides the strength expected from a structural-grade washer, while the 5/8 in. inside diameter accommodates the corresponding fastener size. Its plain finish keeps the washer free of a decorative or corrosion-resistant coating, making it appropriate for compatible assemblies where the surrounding materials and environmental conditions call for uncoated structural hardware.
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