DIN 134 Large Plain Washers White Zinc-Plated M2.5M3M4M5 Flat Gasket Washer
Flat washers are usually thin pieces of various shapes designed to reduce friction, prevent leakage, isolate, prevent loosening or distributing pressure. These components are found in many materials and structures and are used to perform a variety of similar functions. Restricted by the material and process of threaded fasteners, the supporting surface of bolts and other fasteners is not large, so in order to reduce the compressive stress on the bearing surface to protect the surface of the connected parts, gaskets are used