Cap nut
Cap nut are used to cover exposed bolts or nuts to hide ugliness, protect and prevent hidden dangers.
M Size: M3-M20
peek plastic material:PA66/PP
product type: Protective caps
Finish: Naturalcolor/White/black.Othercolorscanbe customized.
Cap nut
Product Drawing

Cap nut are used to protect and beautify bolt/nut connections. The cap has a metal threaded sleeve or frame embedded inside, which can be easily buckled or screwed on. It can also withstand a certain amount of torque and pressure, and can be repeatedly removed and installed without being easily damaged like ordinary plastic caps.
It is recommended to use screws and nuts of the same material.
Key Features
- Internal Reinforcement Structure: Typically, a metal threaded sleeve or reinforcing frame is embedded within the plastic.
- Corrosion Resistance and Insulation: The outer plastic layer provides excellent corrosion resistance and electrical insulation.
- Aesthetics and Safety: The installed surface is smooth and aesthetically pleasing, and scratch-resistant.

ISO 9001 Certified
Certified through Quality Veritas. High Performance Polymer conforms to the ISO9001 quality management system. Certificates available on request.
Material Certificates
Full material traceability and certification confirming the material data and raw material batch number, which can be traced back to the manufacturer
Certificate Of Conformity
Product certificate of conformity available on request, confirming the product manufacturing standard and material.
Highly Competitive Prices
We offer price matching against all UK distrubutors. All of our products are manufactured to the highest standards and exhibit exceptional characteristics.
Applications
- Industrialparts
- Engineeringandconstruction
- Agriculturalequipment
- Medicalmachinery
- Cableandpipeline
- Chemicalindustry
- Dailynecessitiesandotherfields
Advantages
- High Strength and Durability: The internal metal frame ensures it can withstand high tightening torques and repeated assembly and disassembly without risk of stripping or cracking.
- Dual Protection: Combining the strength of metal with the corrosion resistance of plastic, it provides comprehensive protection for bolted joints.
- Easy Installation: Typically, a snap-on or screw-in design is used for quick installation and a uniform appearance.
Packaging & Delivery
Standard packaging includes PE bag, foam cover, and one double-deck corrugated outer carton for safety during transit. Delivery time is 5-15 working days depending on the quantity.









