CAP NUT / ACORN NUT (DIN1587)

CAP NUT / ACORN NUT (DIN1587)
Domed Cap nut, also referred as acorn nut, crown hex nut, blind nut, cap nut, or dome nut.

Cap nut is a nut that has a domed end on one side. When used together with a threaded fastener with an external male thread, the domed end encloses the external thread, either to protect the thread or to protect nearby objects from contact with the thread. In addition, the dome gives a more finished appearance.

Acorn nuts are usually made of brass, steel, stainless steel (low carbon content) or nylon. They can also be chrome plated and given a mirror finish.

There are two types of acorn nuts. One is low, or the standard acorn nut. The other is the high acorn nut. The high acorn nut is wider and higher and will protect extra long studs. There are also self-locking acorn nuts that have distorted threads in the hex area to create a tight friction fit to prevent the nut from vibrating loose.

There are standards governing the manufacture of acorn nuts.
SAE Standard J483, High and Low Crown (Blind, Acorn) Hex Nuts.
DIN 1587, Hexagon Domed Cap Nuts.

INTERNATIONAL STANDARDS

  • DIN 1587
  • DIN 917
  • SAE Standard J483, High and Low Crown (Blind, Acorn) Hex Nuts.

PRODUCT APPLICATIONS

  • A cap nut serves to protect the bolt threads underneath, but also provides a cleaner appearance, and may improve safety on certain joints and applications. When your application requires a smooth finish, or all rough-edged fasteners and exposed threads must be covered, cap nuts provide an excellent solution
  • Commonly used in the cycling bicycle, home DIY and automotive industries.

MATERIAL

•    LOW CARBON STEEL : C1006 - C1045
•    STAINLESS STEEL: SUS304, SUS316, SUS410
•    GRADE 8.8: C1018 - C1022, 10B21
•    MILD STEEL / MID CARBON STEEL: C1035 - C1045
•    ALLOY STEEL: SCM435 - SCM440 (Grade 10.9, Grade 12.9)
•     │8│GRADE 1008K 1010
•    7 8 GRADE 1015(M<16) CH38F (M≥16)
•    8 10 GRADE CH38F 1039 10B21 10B33
•    9 12 GRADE 1039 10B21 10B33 10B38
•    BRASS C2600, C2700, C2680
•    RED BRASS C1100
•    Phosphor Bronze C5191
•    Aluminum Alloy 1050, 5052, 6061
•    Material according to customer’s specifications

SIZE RANGE

STANDARD SIZE RANGE:
  • 1/8" - 3/4"
  • M3 - M16

SURFACE TREATMENT

SURFACE

  • HEAT TREATMENT
  • ZINC PLATED – WHITE ZINC / YELLOW ZINC / BLACK ZINC
  • Zinc trivalent coatings Cr3+ (Meet RoHS standards)
  • Zinc hexavalent zinc plating Cr6+
  • Nickel plating
  • Black Oxide
  • Hot Dip Galvanised
  • GEOMET® 500
  • DACROMET®
  • Passivation
  • All electro-plating, electro-coating and surface treatment specifications can meet customer's requirements.