Custom square rubber feet plug sealing vial caps

A square rubber feet plug provides a fitted rubber end for a matching square feature. The widths, corner radii and insertion depth must work together. A plug can match the nominal side dimension yet sit poorly if its corners meet the tube or recess before the rest of the body reaches its seat.

Use the finished mating part when developing the profile. Coatings and internal corner shapes can reduce the available space, while an uneven cut can cause the exposed foot to lean. ETOL can customize the material, hardness, color and dimensions around these details.

Align the square sections before insertion instead of twisting a partially seated plug to correct its orientation. Inspect the visible face after fitting and check that the supported assembly rests as intended. If the rubber carries a contact load, evaluate that function in the complete assembly. The shape of the foot alone does not establish a load capacity or suitability for a separate sealing application.

Material options

Rubber compound options, customized alongside the profile and contact conditions.

Hardness selection

Solid rubber options: 30–90 Shore A. The widths, corner radii and insertion depth must work together.

Custom geometry

A plug can match the nominal side dimension yet sit poorly if its corners meet the tube or recess before the rest of the body reaches its seat.

Fit evaluation

Inspect the visible face after fitting and check that the supported assembly rests as intended.

Color & OEM

Custom colors; OEM identification positioned outside closure contact surfaces.

Photos illustrate structure or material appearance only. The widths, corner radii and insertion depth must work together. ETOL directly manufactures custom-shaped silicone and rubber parts to your requirements.