Plain Washer is a flat, circular component installed under a bolt or nut during use. It is used to distribute tightening load, protect the contact surface, and improve joint stability.
It is also known as a round washer, plain washer, or simply washer, and is often abbreviated as W.
In Japan, common standards for round washers include:
JIS B 1256:1963 (commonly referred to as the old JIS standard)
JIS B 1256:1978 (commonly referred to as the ISO standard)
Each standard is further classified into:
Standard type (larger outer diameter)
Small type (smaller outer diameter)
Available Materials
Iron,Stainless Steel,Brass,Aluminum,Resin
Available Surface Treatments
Trivalent Chromate,Trivalent Black Chromate,Hexavalent Chromate,Nickel Plating,Chrome Plating,Hot-Dip Galvanizing,Black Oxide,Plain
