#20 (5/16") × 3/4" × .057"–.067" Silicon Bronze Flat Washer

Manufactured from 651 silicon bronze, this #20 (5/16") flat washer is designed for excellent corrosion resistance and long‑term reliability in demanding environments. The 3/4" outside diameter and .057"–.067" thickness range provide effective load distribution and surface protection, helping maintain secure assemblies. Commonly used in marine, architectural, and electrical applications, it performs exceptionally well in outdoor and saltwater‑exposed conditions where durability is essential.