18 Years Factory Drywall Spring Toggle Anchor Bolt - Flat Washer – Ji Luo Fastener

Flat washer
Flat washers are usually thin pieces of various shapes, used to reduce friction, prevent leakage, isolate, prevent loosening or disperse pressure. Many materials and structures have such components for performing various similar functions. Due to the material and process limitations of threaded fasteners, the supporting surfaces of bolts and other fasteners are not large, so gaskets are used to reduce the compressive stress of the bearing surface to protect the surface of the joints.
Connecting teeth of tooth-shaped elastic washers are widely used in automotive industry because of their high locking force and uniformity.