M8M10M12 304 stainless steel black nut 201 semi-round head cover nut manufacturer spherical integrated cover nut

These 304 & 201 Stainless Steel Black Dome Head Cap Nuts are professionally designed for decorative and industrial fastening applications. Made of high‑quality 304 and 201 stainless steel with a black finish, they offer excellent rust resistance, corrosion protection, and durability for indoor, outdoor, and humid environments.

 

Featuring a one‑piece spherical semi‑round head design, these integrated cover nuts provide a clean, finished look while protecting bolt ends from damage, dust, and moisture. The smooth dome shape enhances appearance and prevents scratches, making them ideal for visible areas in furniture, decoration, and fixtures.

 

These black cap nuts are precision‑manufactured for stable fitting, easy installation, and reliable locking. They effectively reduce loosening from vibration and offer long service life.

 

Widely used in furniture assembly, interior decoration, outdoor hardware, mechanical equipment, automotive parts, and architectural fittings. Available in M8, M10, M12 sizes to meet various industrial, DIY, and wholesale needs.