Specification: Dimension: Description: Washers made from copper are often used within piping, electronics, household products, and biomedical applications as copper is malleable and ductile– a biostatic surface that is a good conductor of heat and, when very pure, a good conductor of electricity. Q&A: Q: What Is the Difference Between a Flat Washer and a Gasket? A: A gasket is usually a flat part that seals two adjoining equal surfaces. A gasket can have any shape not necessarily circular like a washer. They are used in cars like valve covers and pool pumps and pipes with flanges that carry liquid or gas. The material can be any thing that so long it will serve the purpose. Mostly rubber compounds but also plastic and paper. The material used is usually softer so it will conform to the adjoining surfaces to be sealed.
eBay