ASTM A194 Gr 8M ( AISI SS 316 ) Nuts

ASTM A194 8m AISI SS 316 Nuts, Specifications & Dimensions

ASTM A194 8m AISI SS 316 nuts are internally threaded fasteners that mate with bolts and studs to form clamped joints. TorqBolt manufactures ASTM A194 8m AISI SS 316 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, ASTM A194 8m AISI SS 316 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

ASTM A194 8m AISI SS 316 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.

ASTM Carbon & Alloy Steel Bolting Specifications

The ASTM A193 / A194 / A320 / A325 / A490 / F568 family covers carbon and low-alloy steel bolting standards for pressure vessels, structural steel, and high-temperature service.

ASTM A193 Grade B7 is the workhorse: AISI 4140 chrome-moly, quench + temper to 105 ksi yield min, the default for ASME flanged-joint stud bolts to 500°C. B7M is hardness-controlled (≤ HRC 22) for sour service. B16 uses Cr-Mo-V for service to 600°C. ASTM A320 L7 / L7M / L43 are cryogenic variants per Charpy at -101°C. A194 grade 2H / 7 / 7M / 16 are matching nut grades.

EN 10204 3.1 / 3.2 certificates standard, with hardness, tensile, Charpy, and through-hardening checks per the lot release procedure.

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