DIN 985 Carbon Steel Cap Nuts Hex Base Dome Top Bolts For Protection Aesthetics

Cap nuts are fasteners that integrate protective functionality and decorative appeal. Featuring an integrated “hexagonal base + dome - shaped top" design, they provide comprehensive coverage and protection for bolt ends.

1. Structural Advantages
   • The hexagonal base works with standard tools (e.g., wrenches, sockets), enabling quick and easy installation.
   • The dome - shaped top fully covers exposed bolt threads: it hides burrs, stops impact damage, and keeps out dust and moisture to prevent thread rust.
2. Unity of Aesthetics & Protection
   The smooth dome surface gives assembly areas a neat, polished look. They’re perfect for situations where exposed bolts need both function and beauty (like furniture, equipment exteriors, automotive parts), getting rid of the roughness of visible threads.

• Base Material: Made from high - strength carbon steel (or custom stainless steel) to ensure reliable fastening.
• Surface Treatment: Standard galvanization (nickel plating, Dacromet, etc., available as options) improves corrosion resistance, good for tough environments (humid, outdoor, etc.).
• Compatibility: Internal threads match standard bolts (GB, ISO, etc.), and sizes can be customized (e.g., M4 to M24).

• Mechanical Equipment: Protect surface bolts and cut down on thread damage during maintenance.
• Furniture Assembly: Make exposed connections (e.g., tables, chairs, cabinets) look more elegant.
• Automotive/Motorcycle: Shield chassis and exterior bolts from mud, dirt, and rust.
• Decorative Projects: Give exposed fasteners (e.g., railings, display racks) a polished appearance.

Cap nuts combine protection (corrosion resistance, impact protection), aesthetics (thread hiding), and ease of use (hex - based installation) — making them the top pick for functional decorative fasteners.