A hardened washer is a high-strength flat washer manufactured from heat-treated steel, designed to withstand heavy loads, high clamping forces, and abrasive environments. The hardening process significantly increases durability, making these washers ideal for use with high-tensile bolts where standard mild-steel washers would deform or wear prematurely. They provide a stable bearing surface, help maintain bolt tension, and prevent surface damage under extreme compression.
