What material grade does Nimonic 75 Fasteners use?

Nimonic 75 Fasteners are manufactured per the applicable ASTM, ASME, DIN, or ISO specification for the material grade. TorqBolt provides material test certificates (MTC) per EN 10204 3.1 or 3.2 with every supply.

What sizes are available for Nimonic 75 Fasteners?

TorqBolt manufactures Nimonic 75 Fasteners in metric sizes M6 to M100 and imperial sizes 1/4" to 4" diameter, with custom lengths from 10mm to 3000mm. Non-standard sizes are available on request.

Are Nimonic 75 Fasteners NACE MR0175 / ISO 15156 certified?

Yes, Nimonic 75 Fasteners can be supplied with NACE MR0175 / ISO 15156-2/3 sour service certification when specified at order. Material certificates and test reports are provided.

What is the typical delivery time for Nimonic 75 Fasteners?

Standard stock items ship in 1-2 weeks. Custom manufactured Nimonic 75 Fasteners typically ship in 4-6 weeks depending on quantity, material availability, and certification requirements.

Do you provide third-party inspection for Nimonic 75 Fasteners?

Yes, third-party inspection by TUV, Lloyd's Register, BV, DNV, SGS, and Intertek is available upon request for Nimonic 75 Fasteners. Witness testing and stage inspections can be arranged.

Nimonic 75 Fasteners Manufacturer & Supplier

Nimonic 75 Fasteners Specification

NIMONIC 75 Fasteners like Heavy Hex Bolts Screws Nuts Washers

NIMONIC 75 is a nickel chromium alloy with additions of carbon and titanium. Also Known as Alloy 75 this alloy is resistant to oxidation at elevated temperatures with a medium strength. Nimonic Alloy 75A can be provided in solution annealed and precipitation hardened condition.

Nimonic 75 Fasteners Properties

Equivalent Designation
ASTM/ASME	AISI	UNS	British Standard	Werkstoff No.	En Name	Swedish(SS)	JIS(SUS)
–	–	N06075	–	2.4951	–	–	–

TorqBolt manufactures Nimonic 75 Fasteners via cold forging, hot forging and CNC machining. Sizes range from M1.0 to M100 (metric) and 1/16" to 4" (imperial). Available in coarse, fine, UNC, UNF, UN, BSW and acme threads with half, full or double-end thread configurations. Each Nimonic 75 Fasteners batch is supplied with EN 10204 3.1 or 3.2 material test certificates.

Hexagon Bolts

ANSI B18.2.1
ANSI B18.2.3.1M
DIN 931
DIN 933
BS 1768
UNI 5731
UNI 5737
UNI 5739
ISO 4014
ISO 4017
BS 1769
BS 3692

Socket/Slotted Set Screws

DIN 913
DIN 914
DIN 915
DIN 916
DIN 551
DIN 553
DIN 438
BS 4168

Socket/Slotted Countersunk Screws

DIN 963
DIN 7991
BS 4168
BS 1981
BS 483
BS 2470

Socket Cap Screws

ANSI B18.3
B18.3.1M
DIN 912
DIN 6912
DIN 7984
ANSI B18.3
ISO 4762
UNI 5931
BS 2470
BS 4168

Stud Bolts

ASME B18.2.1
DIN 976
DIN 938
DIN 939
DIN 2510
BS 4439
BS 2693
BS4882

Nuts

ANSI B18.2.2
ANSI B18.2.4.6M
DIN 934
DIN 936
BS 1768
BS 1769
BS 1083
BS 3692
ISO 4032
ISO 4033
ISO 4035
UNI 5587
UNI 5588
UNI 5589

Washers

ASME B18.22.1
ASTM F436
ISO 7089
DIN 125
DIN 9021
BS 4320
BS 3410
DIN 127
BS 4464
BS 1802
UNI 6952

Surface Treatments & Coatings

Electro Less Nickel Plating Electro Cadmium Plating Dacromet 320 500 Coating Pickled Passivated Fasteners Silver Plating Nickel Plating Electro Zinc Cobalt Plating Electro Zinc Nickel Plating Ptfe Fluorocarbon Coating Aluminizing Ceramic Filled Fluorocarbon Coating

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Nimonic 75 Fasteners — Material Overview & Form Factors

Nimonic 75 is a high-performance alloy used wherever standard fasteners cannot meet the corrosion, temperature, or strength envelope. TorqBolt manufactures the full Nimonic 75 fastener range — bolts, nuts, screws, washers, studs, and custom forgings — under one ISO 9001:2015 quality system, with PED 2014/68/EU module-H qualification for pressure-equipment service.

Where Nimonic 75 Excels

Nimonic 75 is specified in oil & gas wellhead components, refinery heat exchangers, petrochemical reactors, power-generation turbines, marine offshore platforms, and pharmaceutical / food-grade processing. Its corrosion resistance, high-temperature strength, and weldability make it the default for service conditions outside the carbon and standard-stainless envelope.

Form Factors Available

Bolts — hex, heavy hex, socket, button, countersunk; M6–M100 / 1/4"–4"

Nuts — standard, heavy, jam, locking variants (nyloc, all-metal, flange)

Screws — cap, machine, set, shoulder, self-tapping; all common drive types

Washers — plain, spring, lock, Belleville, fender, tab

Studs & threaded rod — ASTM A193 / A320 / A453 / A540

Custom forgings — rings, blanks, shaped components to drawing

Standards & Certification

Nimonic 75 fasteners are supplied with EN 10204 3.1 (mill cert) or 3.2 (third-party witnessed) material test reports as standard. Additional certification packages: NACE MR0175 / ISO 15156 (sour service), NORSOK M-650 (subsea / topside), API 6A (wellhead), API 20E (subsea bolting), PED 2014/68/EU (pressure equipment). Third-party inspection by TUV, Lloyd's, BV, DNV, SGS, and Intertek arrangeable on order.

Lead Time & Sizes

Stock items in standard Nimonic 75 fastener sizes ship in 1–2 weeks; custom-manufactured items in 4–6 weeks subject to material availability. Diameters M6–M100 and 1/4"–4", lengths 10 mm–3000 mm covered in-house; oversize / non-standard sizes quoted to specification.

Nimonic — Nickel-Chromium Wrought Superalloys

Nimonic is a family of wrought nickel-chromium superalloys originally developed for jet-engine turbine blade and bolting service, where steady-state operating temperatures exceed 700°C under high cyclic stress. Composition centers on ~50-75% Ni, 15-22% Cr, 0-20% Co with Ti+Al additions for γ' precipitation hardening. Nimonic alloys retain creep strength well beyond the limits of conventional Fe-Ni-Cr superalloys.

Nimonic 75 (UNS N06075) is the simplest grade: solid-solution Ni-Cr without precipitation hardening, used for furnace fixtures and mild-temperature bolting to 760°C. Nimonic 80A (N07080) adds Ti+Al for age-hardening — tensile ~1100 MPa, the workhorse of steam-turbine and exhaust-valve bolting per ASTM B637 / AMS 5662. Nimonic 90 (N07090) adds 16-20% Co for service to 920°C with stress-rupture life suitable for gas-turbine combustor bolts.

Nimonic fasteners ship per ASTM B637 / B564 with EN 10204 3.1 / 3.2 certs covering chemistry, hardness (HRC 30-42), tensile at room + elevated temperature, and stress-rupture acceptance per the heat-treat condition. NACE MR0175 sour-service compliance available in solution-annealed condition.

Nimonic 75 Fasteners