Made in China rubber product flat natural rubber washer

A flat natural rubber washer creates a flexible annular contact around a hole or fastener. Its inner diameter, outside diameter, and thickness define different aspects of the fit: clearance at the center, contact area around it, and the amount of material available to compress between the mating surfaces.

Select those dimensions together with the fastener head or adjoining hardware. A small hard contact can press deeply into the rubber without loading the full washer face, while a center opening that is too tight may distort during assembly. The mating surfaces should support the washer without leaving a sharp edge beneath its working area.

Natural rubber suitability depends on the environment, so assess the selected formulation against relevant fluids, heat, and outdoor exposure. During tightening, observe the washer rather than assuming additional force always improves the joint. Excessive squeezing can push material out of position. Where the washer is intended to seal, verify that function in the complete connection and inspect the contact area after disassembly for cuts, extrusion, or lasting uneven deformation.

Material options

Natural rubber, with alternative rubber or silicone compounds selected for the contact surfaces and service conditions.

Hardness range

Rubber: 30-90 Shore A; silicone: 20-80 Shore A. Final hardness depends on the selected compound and part design.

Custom shape & size

Inside and outside dimensions, thickness and non-circular outlines matched to your fastening arrangement.

Color & OEM

Custom colors and OEM packaging; marking options depend on the available washer surface.

Tooling & samples

Samples reviewed for fastener clearance and the assembled compression before production.

The washer photos are structural and material references. ETOL's factory can produce non-standard silicone and rubber washers with the outline, opening and thickness suited to your fastener layout and contact footprint.