Stainless Steel A182 F44 Nuts

A182 F44 Nuts — Specifications & Dimensions

A182 F44 nuts are internally threaded fasteners that mate with bolts and studs to form clamped joints. TorqBolt manufactures A182 F44 nuts per ASME B18.2.2, ISO 4032/4033/4034, DIN 934/EN 24032, and DIN 6915 (heavy hex), in sizes M6–M100 and 1/4"–4".

Nut Height Categories

Locking Variants

For vibration-loaded joints, A182 F44 nuts are available as nyloc, all-metal prevailing-torque (DIN 980), flange-serrated (DIN 6923), and castle / slotted (DIN 935, cotter-pin retention).

Mechanical & Certification

A182 F44 nut threads are gauged per ASME B1.1 / ISO 965 to Class 2B / 6H. Proof-load testing per ASTM F606 verifies the nut develops the bolt's full strength without thread strip. Each lot ships with EN 10204 3.1 / 3.2 certificates. NACE MR0175 / ISO 15156 sour-service certification available.

Duplex & Super Duplex Stainless Steels

Duplex stainless steels have ~50/50 ferrite-austenite microstructure, doubling yield strength of 304/316 grades while improving chloride pitting resistance.

Duplex 2205 (UNS S32205) is standard with PREN ~35. Super Duplex 2507 (S32750) and Zeron 100 (S32760) push PREN to 41-42. SA-182 F51 / F53 / F55 / F60 are the ASME forged-flange equivalents.

Phase balance is critical: ferrite must stay 35-65% in weld + HAZ (ASTM A923 testing). Solution anneal at 1040-1100°C followed by water quench. Fasteners ship per ASTM A276 / A479 with EN 10204 3.1 / 3.2 certs including ferrite count and Charpy at -46°C.

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