Rubber nut cap
Rubber nut cap covers up the unsightly parts that are prone to damaging the end of bolts as well as cap screws. In addition, cap nuts are designed to give the final product a neat and finished look, while helping to provide higher efficiency during applications where insulation is required. Rubber nut caps are vibration resistant, plus they function as a spanner washer in order to spread the load on the fasteners over a larger area. There are also some rubber nut caps that can be coated so as to look like the outer surface, which will contribute to the tidy appearance of your item. Furthermore, you can find them in a wide variety of shapes, dimensions, and designs. The standard design utilizes a dome shape to provide a softened end for bolts as well as screws. However, you can use other designs, including a deep-drawn cap nut, to provide more room for longer fasteners or the ones with blunt tips. Most rubber nut caps are designed with threads to provide ultimate dependability. On the other hand, some use several contact points to ensure the nut stays in place, in contrast to threads that are compatible with the corresponding bolt. So the latter design enables you to apply cap nut fasteners to practically every fastener to the extent that the size and profile both fit. There are contact point brands that apply an insert in order to improve the grip on the circumference of the shaft. Always be up to date with manufacturing and achieve an upgraded finishing using cap nut fasteners. No matter if your application requires threaded cap nuts or contact points, consult with your fastener distributor regarding the advantages rubber nut cap can bring to your product including the added value and increased competitive edge.
Rubber Cap Size Catalog
Compare the internal and external dimensions of rubber caps against the part being covered.
Custom colors are available to your Pantone color code. Include the code in your inquiry.
Rubber Caps-RSE
Compare A (inner diameter), B (outer diameter), C (inner depth) and D (total height), in mm.

Need a different size? Share your drawing, mating dimensions and intended use to discuss a suitable part.
Discuss Your RequirementsProduct specifications
- Product form
- Protective cover for exposed fastening hardware
- Dimensions to confirm
- Nut across-flats and across-corners dimensions, exposed height and cap cavity.
- Installation discussed
- Screw attachment. Identify the chosen retention method and the surface or hardware it engages.
- Access after fitting
- Leave room for fitting and removal without displacing the fastener.
Need a quote or a custom part?
Send your requirements, drawings or samples to discuss standard and custom silicone rubber parts.
Email us[email protected]