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A washer is a thin plate (typically disk-shaped) with a hole (typically in the middle) that is normally used to distribute the load of a threaded fastener, such as a screw or nut. Other uses are [...]

PAN HEAD: Recommended for new designs to replace round, truss and binding heads. Provides a low large diameter head, but with characteristically high outer edge along the outer periphery of the [...]

Differences between an internal tooth lock washer & an external tooth lock washer Tooth lock washers are made with small, sharp teeth formed around the inner hole or outer diameter (O.D.), [...]