904L Spring Washers is a ring split at one point and bent into a helical shape.
These Spring Washers also known as Split Washers, causes the washer to exert a spring force between the fastener's head and the substrate, which keeps up the 904L Lock Washer hard against the substrate and the fastener thread hard against the nut or substrate thread, making more friction and resistance to rotation.
Environment
Safety
CSR