Caterpillar 7X7729 Flat Washer is a heavy‑duty steel washer designed for M10 fasteners, listed by Cat as an A‑Hard washer for high‑load applications. It measures 3 mm in thickness and features a 10 mm inner diameter, built to withstand the wear of frequent assembly and disassembly. This washer's primary role is to prevent the fastener from sinking into the material and to distribute the clamping load more evenly, which helps maintain joint integrity under heavy‑duty use. Suitable for CAT equipment and other demanding bolt assemblies that require a hard bearing surface, it provides a reliable, durable option wherever an M10 flat washer is required.
