Karna International

Product family

Nuts

Hex and heavy hex nuts, flange nuts, and locking nuts including nylon lock, self-locking and castle nuts. The range also covers slotted, automotive, coupling, cap, cage, barrel, rivet, spring, split, square weld and T-nuts, and the pins that go with them: split cotter, R and spring (roll) pins.

Call +1 (415) 725-9165 or WhatsApp, Mon–Sat, 9:30–18:30 IST

Standards
IFI, ANSI, ASME, SAE, ASTM, DIN, ISO, JIS, USS, BS, or to customer drawing
Materials
Spring Steel/ SS, Carbon steel, high tensile steel
Finishes, done in-house
  • Hot-dip galvanizing
  • Zinc plating in white, blue, black, yellow or green, all with trivalent (Cr3+) passivation — hexavalent-chromium-free
  • Black phosphating
  • Autoblack
  • Magni coating
  • Gleitmo wax coating
  • GEOMET coating
  • Powder coating

Product lines

21 lines

Nuts

Download catalogue

Every product family, with standards and size ranges. Tell us who you are and we’ll email you a link to read and download it, opening at page 1.

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Standards
DIN, BS, ISO and American standards
Materials
Carbon steel and high tensile steel, unless a line says otherwise

Other sizes on request.

Nuts: Nuts
ProductSizesLengthMaterialQuote
Hex nut
M6–M52 / 1/2"–1-1/2" UNC/UNF
Pal NutNot in the printed catalogue, but we supply it.
Spring Steel/ SS
Rivet nut
Nylon lock nut
M6–M24 / 1/4"–1" UNC/UNF
Flange nut
M6–M24 / 1/4"–1"
T-nut
Spring nut
Castle nut
M6–M36 / 1/4"–1-1/2"
Slotted nutNot in the printed catalogue, but we supply it.
M6–M36 / 1/4"–1-1/2"
Coupling nutHex long nut (coupler). Dual-thread available.
M6–M30 / 1/4"–1" UNC
to 150 mm / 6"
Heavy hex nut
Barrel nut
Cage nut
Self-locking nut
Square weld nut
Cap nut
Split nut
Automotive nutNot in the printed catalogue, but we supply it.
M8–M52 / 5/16"–2"

Pins

Nuts: Pins
ProductSizesMaterialQuote
Split cotter pin
1.6–5 mm / 1/16"–5/16"
R pin (R clip)
2–8 mm / 3/32"–5/16"
Carbon steel, high tensile steel
Spring (roll) pin
2.5–8 mm / 3/32"–5/16"

Get a quote

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Add lines to your quote list as you go, or send part numbers, quantities and the delivery location.

Call +1 (415) 725-9165 or WhatsApp, Mon–Sat, 9:30–18:30 IST

Two members of the Karna International team at the IFE Phoenix 2026 stand, Booth 2635, between tables of fastener, strut and bracket samples under pole line, fastener, channel and dock hardware banners

Booth 2635 · 8–⁠9 October 2026

Thank you for visiting us at IFE Phoenix

It was good to meet you at Booth 2635. Send us your drawing, part list or quantities, and we'll come back to you with a quote.