The Server Products 85069 O-Ring 1-5/16" OD is a circular elastomer seal that is inserted between two mating components into a groove or channel and compresses to aid in the prevention of fluid or gas leaking through the joint. When placed in its respective groove, the part is forced to deform a bit under pressure such that the interface along the circumference remains closed. This O-... https://partsfe.com/85069-server-products-o-ring-1-516-od