RUBBER WASHER

In the world of sealing and industrial hardware, a Rubber Washer is a flat ring made of an elastomeric material. While it looks simple, its primary "feature" is its ability to act as a gasket—deforming under pressure to create a liquid or airtight seal between two flat surfaces.

·  Durometer (Hardness): Easy to compress; great for low-pressure plastic fittings.

• Hard (70--90 Shore A): Required for high-torque bolting applications to prevent the washer from "squishing" out of the sides.

·  Compression Set: This is the "memory" of the rubber. A high-quality washer will return to its original thickness after being loosened. Low-quality rubber will stay flattened, leading to leaks if the bolt is ever re-tightened.

·  ID / OD / Thickness: * ID (Inside Diameter): Must fit snugly around the bolt or pipe.

• OD (Outside Diameter): Must be large enough to cover the sealing surface but small enough to fit in the housing.