13mm Rubber protector end caps square rubber cover

These rubber protector end caps are presented as a 13 mm square cover. A square fitting needs attention to the faces and the corner shape, because both influence how the rubber sits over the protected end. The nominal size should be checked against the intended mating dimension before selecting the finished part.

Measure the component across its flats and examine whether its corners are sharp, rounded or affected by a coating. A cap can fit the flat measurement yet stretch excessively at a corner. The available engagement length also matters: a nearby shoulder may prevent the cover reaching its intended position. Custom size, material and color options can be used to suit that relationship.

Align the corners before pushing the cap on instead of rotating it under tension. Remove sharp burrs so they cannot cut into the interior during fitting. Once seated, inspect the mouth for one side remaining higher than the others. For later removal, work the cover off evenly rather than pulling one corner until the wall turns inside out.

Material options

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

Hardness selection

Solid rubber options: 30–90 Shore A. A cap can fit the flat measurement yet stretch excessively at a corner.

Custom geometry

The nominal size should be checked against the intended mating dimension before selecting the finished part.

Fit evaluation

Remove sharp burrs so they cannot cut into the interior during fitting.

Color & OEM

Custom colors; OEM identification positioned outside closure contact surfaces.

Photos illustrate structure or material appearance only. A square fitting needs attention to the faces and the corner shape, because both influence how the rubber sits over the protected end. ETOL directly manufactures custom-shaped silicone and rubber parts to your requirements.