Inconel 625 Nuts

Inconel 625 Nuts — Specifications & Dimensions

Inconel 625 nuts are internally threaded fasteners that mate with bolts and studs to form clamped joints. TorqBolt manufactures Inconel 625 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, Inconel 625 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

Inconel 625 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.

Inconel — Nickel-Chromium Superalloys

Inconel alloys are nickel-chromium-based superalloys engineered for service where standard stainless steels cannot survive. The Inconel family combines high-temperature strength (700-1100°C depending on grade) with outstanding oxidation and chloride-pitting resistance.

Inconel 718 is age-hardenable Ni-Cr-Fe-Mo-Nb strengthened by γ' and γ'' precipitates after solution + double-age treatment per AMS 5662. Inconel 625 is solid-solution strengthened by Mo+Nb. Inconel X-750 uses Ti+Al precipitation hardening for spring + bolt applications. Inconel 600 / 601 are general-purpose grades for furnace and heat-exchanger fasteners.

Specifications: ASTM B637 (forged bar), AMS 5662/5663 (rod/bar), ASTM B446 (625 bar). NACE MR0175 / ISO 15156 sour-service envelopes available on most grades. PREN values typically exceed 50 across the Inconel range.

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