The flat washer provides a bearing surface for fastener load distribution or is used as a spacer between components. PTFE (polytetrafluoroethylene) provides a low-friction surface and offers resistance to corrosion and most chemicals.PTFE gasket offers a more stable isolation performance even at a extremely natural conditions than silicone material ones.Can be widely used in food,, aerospace, automotive, sanitary ware, electronics, bearings, and other industries.