Monel 400 Bolts

Monel 400 Bolts, Specifications & Dimensions

Monel 400 bolts are externally threaded fasteners with an integral head, manufactured per ASME B18.2.1, ISO 4014/4017, and DIN 933/931. TorqBolt produces Monel 400 bolts in metric (M6–M100) and imperial (1/4"–4") diameters with custom lengths from 10 mm up to 3000 mm.

Head Styles Available

Thread & Shank

Monel 400 bolts are supplied with full or partial threading. Full-thread (UNC, UNF, ISO metric coarse/fine) for tension-only joints; partial-thread shank for shear loads. Thread fits per ASME B1.1 (Class 2A) or ISO 965 (6g) by default; tighter Class 3A / 4h6h on request.

Mechanical & Certification

Monel 400 bolts achieve characteristic tensile, yield, and elongation per the source-material spec, with proof-load testing and hardness verification per ASTM F606 / ISO 898-1. Each lot ships with EN 10204 3.1 (or 3.2) certificates listing chemistry, mechanicals, hardness, and dimensional inspection. NACE MR0175 / ISO 15156 sour-service certification on request.

Monel, Nickel-Copper Alloys

Monel alloys are 67% Ni / 33% Cu solid-solution alloys distinguished by uniform corrosion resistance in seawater, hydrofluoric acid, alkalis, and salt brines.

Monel 400 (UNS N04400) is the base composition. Monel K-500 (N05500) adds Al + Ti for γ' precipitation hardening, raising yield to ~620 MPa, the standard for high-strength shafting in seawater. Monel R-405 is a free-machining variant.

Monel fasteners are produced per ASTM B164 with EN 10204 3.1 / 3.2 certificates. Galvanic compatibility with copper-nickel piping makes Monel the natural mate for naval, desalination, and salt-evaporator service.

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