Custom made NBR rubber washer for oilproof

A custom NBR rubber washer provides an annular contact layer within a defined joint or hardware arrangement. The bore, outside diameter, and thickness should match the supporting faces. For oil exposed use, the selected formulation must suit the actual oil and operating conditions.

Establish the washer's role before choosing its section. A spacing or cushioning layer and a sealing washer can experience different support and compression. The rubber should sit flat without being pinched by a sharp edge or forced around an unsuitable fastener. Include temperature, contact duration, and maintenance fluids in the material assessment. Clean the mating surfaces before fitting and inspect the complete assembly after fastening. Additional tightening should not be used to compensate for a mismatched washer profile. During disassembly, examine the contact pattern and rubber condition. Replacement should preserve the original dimensions and NBR formulation so the joint returns to its intended fit rather than relying on a similar outside diameter alone.

Material options

NBR. Custom formulation and color for the intended contact conditions.

Hardness selection

Rubber: 30–90 Shore A. A spacing or cushioning layer and a sealing washer can experience different support and compression.

Custom dimensions

The bore, outside diameter, and thickness should match the supporting faces.

Fit & assembly

Clean the mating surfaces before fitting and inspect the complete assembly after fastening.

Use & inspection

Replacement should preserve the original dimensions and NBR formulation so the joint returns to its intended fit rather than relying on a similar outside diameter alone.

Photos illustrate structure or material only. The rubber should sit flat without being pinched by a sharp edge or forced around an unsuitable fastener. ETOL directly manufactures custom-shaped silicone and rubber parts to your requirements.