Bonded Washers

Bonded washers are a modified standard washer. 

They consist of an outer ring of a hard material, typically steel, and an inner ring of an elastomeric material that acts as a gasket. 

The bonded washers moulded elastomer lining helps prevent fluids from leaking through bolt holes. Outer rings are also available in brass.

Temperature ranges are limited by the elastomers performance range. Other materials are available. Additional sizes and torque information available through Hi-Tech Seals.