Circular flat washer with a central hole, manufactured to GB/T 97.1, DIN 125 and ASME B18.21.1 dimensions. Installed between a nut and the mating surface, it helps distribute clamping pressure and protects the workpiece from local damage. Intended for use with bolts and nuts in bolted connections.

Materials offered are carbon steel and stainless steel, with surface treatments including galvanizing, black oxide and hot-dip galvanizing. Metric and imperial sizes are available; please confirm the exact standard edition, size and finish required to ensure dimensional compatibility with your fasteners. Typical applications include machinery manufacture, construction engineering and equipment installation.