Nut
Hex Nut
What is a hex nut? A hex nut is a six-sided internally threaded fastener used with a bolt or threaded rod to clamp parts together. Metric sizes follow ISO 4032 (DIN 934 is the legacy equivalent); inch sizes follow ASME B18.2.2. Strength is set by property class per ISO 898-2 or ASTM A563 / A194.
- Standard
- ISO 4032,ISO 4033, DIN 934 , ASME B18.2.2, ASTM A563, ASTM A194 , GB/T 6170
- Size
- Metric M3 – M64 (M6–M36 held as regular stock) , Inch 1/4" – 2" (UNC/UNF), Larger sizes on request
- Material
- Carbon Steel, Stainless Steel, Alloy Steel, Brass, Aluminum, Monel
- Grade
- ISO 898-2 class 4 / 5 / 6 / 8 / 10 / 12 · ISO 3506-2 A2-70, A4-70, A4-80 · ASTM A563 Grade A, B, C, C3, D, DH, DH3 · ASTM A194 Grade 2H, 2HM, 4, 7, 7M, 8, 8M
- Finish
- Plain, Black Oxide, Zinc Plated, H.D.G, PTFE, Dacromet, Chrome, Zinc Nickel
DESCRIPTION
Hex nut dimensions — the numbers that decide wrench fit
Three dimensions govern whether a hex nut fits your tooling and your joint: s (width across flats, the wrench size), e (width across corners) and m (nut height). Thread size alone is not enough to specify a nut — a drawing that states only “M12” is incomplete.
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