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RUBBER & SILICONEStandard parts. Custom solutions.

Rubber bolt caps

Rubber bolt caps

The rubber bolt caps have three main purposes – to provide protection against environmental effects, to provide curing masking, or to help with the protection during the handling and shipping of the device. Now we are going to talk about these three purposes and explain why the rubber bolt caps are utilized in different industries and are implemented in various machines and devices. When it comes to environmental effects, the units are going to protect the insides of the container that might react to keep out the dust, moisture, air, and even light. Some products, components, or machines should not come in contact with oxygen or water, and they will get damaged if they are exposed to light. So, the rubber bolt caps provide a barrier between the environment and the insides of the container. These units will also provide protection to the areas that have to remain uncured and they will not get affected by high temperatures or even chemicals. 

They are most commonly used when it comes to powder coating and anodizing masking. 

Finally, they will also make sure that your products will not be damaged or broken when they are handled and when they are being transported. Note that the rubber bolt caps will make sure that any potentially sharp edges of the opening will not cut through anything that comes in contact with them, and they will also keep the insides intact no matter how they are handled and where they are placed for storage. We can offer a variety of different rubber bolt caps and we can aid you in choosing the right model for your needs. Note that rubber is an extremely durable material, so these units can easily be reused without them getting damaged or broken. If you are reusing them, make sure you properly clean them and that there are no dust or water particles before you install them again.

Rubber Cap Size Catalog

Compare the internal and external dimensions of rubber caps against the part being covered.

Rubber Caps-RSE

Compare A (inner diameter), B (outer diameter), C (inner depth) and D (total height), in mm.

Dimension guide
Rubber cap — A inner diameter, B outer diameter, C inner depth, D total height
Profile reference. Use the dimension letters and units in the selected table and confirm the part drawing.
Product appearance
Rubber Caps-RSE — product view
Illustrative product appearance. Refer to the selected row and part drawing for dimensions.
Part No.ABCDColour
RSE3.7-7-93.77911black,white
RSE4.7-8-94.78911black,white
RSE5.7-9-105.791012black,white
RSE6.7-10-106.7101012black,white
RSE7.7-11-117.7111113black,white
RSE8.7-12-128.7121214black,white
RSE9.7-14-139.7141315black,white
RSE10.7-15-1410.7151416black,white
RSE11.7-16-1511.7161517black,white
RSE12.7-17-1512.7171518black,white
RSE13.7-18-1513.7181518black,white
RSE14.7-19-1514.7191518black,white
RSE15.7-20-1615.7201619black,white
RSE16.7-21-1616.7211619black,white
RSE17.7-22-1617.7221619black,white

Need a different size? Share your drawing, mating dimensions and intended use to discuss a suitable part.

Discuss Your Requirements

Product specifications

Product form
Protective cover for exposed fastening hardware
Dimensions to confirm
Fastener head width and height, exposed thread length and cap cavity.
Exposure to evaluate
Moisture and dust or debris. Validate the selected material under the combined conditions.
Access after fitting
Leave room for fitting and removal without displacing the fastener.

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