Cap Nut
Qi Sheng cap nuts (also known as acorn nuts) are designed to cover exposed bolt threads, helping improve safety, reduce snagging risk, and provide a clean finished look. They are used in equipment, fixtures, furniture hardware, and applications where appearance and protection are important.
We offer cap nuts in different thread sizes, materials, and surface finishes to meet durability and corrosion-resistance requirements. Bulk supply and OEM packaging options are available.
To quote, send thread size, material, finish, quantity, and application details.
DIN1587 Hexagon Domed Cap Nuts, High Type
- Complies with ISO 4033, DIN 1587 (high type), ANSI B18.2.2; high-protection decorative fasteners
- Material: Carbon steel (45#), stainless steel (304/316), brass; strength grades 4.8–9
- Structure: Hexagonal body + high domed closed top (taller than low-type) + internal coarse/fine thread
- Surface treatments: Zinc plating, black oxide, passivation, chrome plating
- Size M2–M36 (matches standard bolts)
DIN917 Hexagon Cap Nuts, Low Type
- Complies with ISO 4033, DIN 917, ANSI B18.2.2; low-profile decorative & protective fasteners
- Material: Carbon steel (45#), stainless steel (304/316), brass; strength grades 4.8–10.9
- Structure: Hexagonal body + low-height cap (thinner than standard cap nuts) + closed top + internal thread
- Surface treatments: Zinc plating, black oxide, passivation, chrome plating
- Size M2–M24 (matches standard bolts)
DIN986 Self-Locking Domed Cap Nut
- Complies with ISO 10511 (self-locking) + ISO 4033 (domed cap), DIN 986, ANSI B18.16.6；integrated anti-loosening, protective & decorative fasteners
- Material: Carbon steel (45#), stainless steel (304/316), brass; strength grades 4.8–10.9
- Structure: Hexagonal body + domed closed top + internal nylon insert (self-locking core) + coarse/fine thread
- Surface treatments: Zinc plating, black oxide, passivation, chrome plating
- Size M2–M36 (matches standard bolts)