China factory custom silicone rubber o-ring flat washer/gaskets

A silicone rubber o-ring and a flat washer serve different seating arrangements. The ring section should match a developed groove, while a flat washer needs supported faces across its width. Selecting by outside diameter alone can leave the wrong contact geometry in the joint.

Custom dimensions, hardness and color options allow the silicone component to follow the assembly. Define the inner opening, outer boundary and section thickness or diameter using the actual mating surfaces. The selected formulation should suit the medium, temperature and cleaning conditions.

During installation, position the part without stretching one area excessively. Check that closing movement does not roll a round section or drag a flat edge out of its seat. Evaluate the complete joint under representative operating conditions. During maintenance, inspect the contact pattern for uneven compression or extrusion into a gap. If the sealing configuration is changed, review the receiving geometry as well as the rubber part. A different section should not be used simply to make a loose fit feel tighter.

Material options

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

Hardness selection

Silicone: 20–80 Shore A. Check that closing movement does not roll a round section or drag a flat edge out of its seat.

Custom dimensions

Define the inner opening, outer boundary and section thickness or diameter using the actual mating surfaces.

Fit & assembly

During installation, position the part without stretching one area excessively.

Use & inspection

During maintenance, inspect the contact pattern for uneven compression or extrusion into a gap.

Photos illustrate structure or material only. Selecting by outside diameter alone can leave the wrong contact geometry in the joint. ETOL directly manufactures custom-shaped silicone and rubber parts to your requirements.