These bonded washers have an outer ring of hard metal to provide load-bearing strength and an inner ring of softer synthetic rubber that creates a tight seal. The hard backing compresses the seal to prevent rotation and leakage around the fastener and surface.

These metal sealing washers have a level shape that allows them to form tight seals between the fastener head and the surface that prevent loosening and leakage. They are used in automobile and electrical applications.

These hygienic thermoplastic sealing washers meet FDA and EU standards for use in food and beverage applications. Their shape and surface finish is optimized for stringent cleaning and they create a hygienic seal when used with hygienic bolts and nuts.

These hygienic USIT sealing washers have a fixed sealing ring that provides a secure seal to meet FDA and EHEDG standards for use in food, beverage, pharmaceutical, and sanitary applications. These stainless steel washers are available with EPDM (ethylene propylene diene monomer) rings for most CIP/SIP (clean-in-place /sanitize-in-place) applications, or with fluoroprene rings for demanding conditions with high temperatures, high-fat compounds, or media containing grease.