+912267437972

+919022636025

enquiry@real-bolt.com

Contact Us

Nimonic 75 Nuts Manufacturer & Exporter in India

Explore Nimonic 75 Nuts Manufacturer & Exporter in India manufactured for demanding industrial applications with reliable strength, corrosion resistance and compliance with international standards.
Request a Quote
View Products

-196

Min Temp

870

Max Temp

🌡

870

Suitable for continuous service up to approximately 870°C under typical operating conditions.

⚡

620

Typical tensile strength around 620 MPa depending on product form and heat treatment.

🛡

Very Good

Very Good corrosion resistance in a wide range of industrial environments.

⚖

8

Typical density is approximately 8.0 g/cm³.

Product Overview

What are Nimonic 75 Nuts?

Nimonic 75 nuts are high-temperature nickel-chromium alloy fasteners manufactured from UNS N06075 bar or forgings, conforming to ASTM B637. This alloy, containing approximately 80% nickel and 20% chromium with controlled additions of titanium and carbon, is renowned for its excellent oxidation resistance and mechanical stability up to 1000°C.

Nimonic 75 nuts are widely specified for bolted joints in gas turbines, heat treatment equipment, and chemical process plants where both high strength and resistance to scaling or embrittlement are critical. Their performance is validated by compliance with international standards such as BS HR5 and ISO 9723, ensuring reliability in demanding thermal and corrosive environments.

Quick Specifications

MaterialNimonic 75
UNS NumberN06075
DIN Number2.4951
Material StandardASTM B637
Nut Standard (Metric)DIN 934 / ISO 4032
Nut Standard (Inch)ASME B18.2.2
Thread FormISO Metric / UNC / UNF
Diameter RangeM6-M64 / ¼"-2½"
Tensile Strength750 MPa (109 ksi) min
Yield Strength340 MPa (49 ksi) min
HardnessMax 220 HB
? All material certified by NABL-accredited laboratory. PMI and hardness survey available on request.

Complete the Fastener Set

Other Nimonic 75 Fastener Products Available from RealBolt

RealBolt also manufactures the complete Nimonic 75 fastener range from certified nickel-chromium-cobalt superalloy bar stock, including Nimonic 75 Bolts, Nimonic 75 Screws, Nimonic 75 Washers, Nimonic 75 Studs, and Nimonic 75 Threaded Rods. All Nimonic 75 fastener types are produced to ASTM with full EN 10204 MTC 3.1/3.2 documentation.
Nimonic 75 Bolts
Nimonic 75 Screws
Nimonic 75 Washers
Nimonic 75 Studs
Nimonic 75 Threaded Rods

Technical Data

Nimonic 75 Nuts Dimensions, Sizes & Thread Standards

Nimonic 75 Nuts are available in metric M6–M100 and inch ¼″–4″ as standard. Per DIN 934 (hex nut) / ISO 4032. Custom thread pitches and heights available. Inch series per ASME B18.2.2. All Nimonic 75 nuts dimensions are verified against applicable DIN, ISO, and ASME B18 standards before dispatch from

Hex Nut Dimensions - Metric (DIN 934 / ISO 4032)

Size (M)Pitch (mm)A/F (mm)Height (mm)
M61.0105
M81.25136.5
M101.5178
M121.751910
M162.02413
M202.53016
M243.03619
M303.54624
M364.05529
M424.56534
M485.07538
M565.58545
M646.09551

Dimensional & Material Standards

StandardCoversThread
DIN 934Hex nutsMetric
ISO 4032Hex nutsMetric
ASME B18.2.2Hex & heavy hex nutsUNC/UNF
BS 1768Hex nutsBSW/BSF
Material StandardRequirement
ASTM B637Bar/forgings - UNS N06075
BS HR5Nickel alloy fasteners
ISO 9723Rod for fasteners
EN 10204 3.1Mill test certificate
EN 10204 3.2TPI-witnessed MTC

Material Chemistry

Nimonic 75 Chemical Composition

Nimonic 75 Nuts are manufactured from a precipitation-hardened nickel-chromium-cobalt superalloy with titanium and aluminium additions per AMS and BS HR specifications. These elements form the gamma-prime (Ni₃Al,Ti) precipitate phase that delivers creep rupture strength above 700°C — a performance level unachievable with standard nickel or stainless alloys.

Chemical Composition per ASTM B637

ElementComposition (%)
Nickel (Ni)72.0 min
Chromium (Cr)19.0-21.0
Iron (Fe)5.0 max
Titanium (Ti)0.2-0.6
Carbon (C)0.08-0.15
Manganese (Mn)1.0 max
Silicon (Si)1.0 max
Copper (Cu)0.5 max
Sulphur (S)0.015 max
? All heats verified by NABL-accredited spectrometry. PMI available on request.

Why Nimonic 75 Alloy Composition Matters for Nuts

Cr (19–21%) — Oxidation Resistance
High chromium content ensures Nimonic 75 nuts resist scaling and oxidation at temperatures up to 1000°C, making them ideal for gas turbine and furnace assemblies.
Ti (0.2–0.6%) — Grain Stability
Titanium additions stabilize the grain structure, improving creep resistance and mechanical integrity under prolonged high-temperature service.
Low Carbon — Prevents Embrittlement
Controlled carbon content minimizes carbide precipitation, reducing the risk of intergranular corrosion and embrittlement in thermal cycling applications.

Fastener Performance

Nimonic 75 Nuts Mechanical Properties & Torque Reference

The table below lists mechanical properties and torque reference for Nimonic 75 Nuts per ASTM. Nimonic 75 nuts achieve 620 MPa tensile strength, with hardness, yield, and elongation values verified by NABL-accredited testing and reported in the EN 10204 MTC.

Nut SizeRecommended Torque (Nm)Clamp Load (kN)
M127032
M1617077
M20340123
M24570178
M301120283
M361960411
M423120566
M484640744
?? Anti-galling: Use nickel-based anti-seize (Molykote P-37). Lubricated values assume K=0.15. Avoid copper-based anti-seize on nickel alloys.

Industry Applications

Nimonic 75 Nuts Applications — Industries & End Uses

Nimonic 75 Nuts from RealBolt are specified across aerospace gas turbines, power generation, and high-temperature furnaces where very good corrosion resistance and 620 MPa tensile strength are required for reliable fastener performance. Click each industry below for detailed application examples.
Nimonic 75 nuts are widely used in gas turbine engine casings, exhaust assemblies, and afterburner sections where high-temperature oxidation resistance and mechanical stability are essential. Approved for use in Rolls-Royce and GE engine maintenance.
Hex nuts and lock nuts for furnace doors, radiant tube assemblies, and heat treatment baskets, providing reliable fastening at continuous operating temperatures up to 1000°C.
Nimonic 75 nuts are specified for bolted joints in reactors, heat exchangers, and piping systems handling hot acids, chlorides, and oxidizing environments where stainless steel fasteners fail.
Used in turbine casing joints, exhaust ducting, and HRSG flange connections, Nimonic 75 nuts maintain preload and resist scaling during thermal cycling in power plants.

Nimonic 75 Nuts Standards & International Certifications

Nimonic 75 Nuts from RealBolt Engineering Industries are manufactured to internationally recognised fastener dimensional standards covering thread form, tolerances, strength grades, and quality requirements. Every batch ships with EN 10204 MTC 3.1/3.2, AMS material certification, heat treatment records, and first article inspection report (FAIR) — available on request for all orders.
Standards
DIN 934 ISO 4032 ASME B18.2.2 IS 1367
Certifications
ISO 9001:2015NABL LabPED 2014/68/EUMTC 3.1 / 3.2

Buy Nimonic 75 Nuts from India's Leading Manufacturer — Get a Competitive Quote Today

Partner with RealBolt — India’s leading manufacturer of certified Nimonic 75 Nuts — for competitive pricing, EN 10204 MTC 3.1/3.2 documentation, and fast Mumbai dispatch. Standard sizes are ex-stock; custom dimensions accepted with 2–3 week lead time. Request your quote today.
022-6743-7972
+91 90226 36025
Email Us

Answers for Buyers

Nimonic 75 Nuts — Frequently Asked Questions

Browse expert answers to common questions about Nimonic 75 Nuts from RealBolt — covering AMS specification, heat treatment, creep rupture data, max service temperature, sizes, and aerospace certification. Contact our technical team directly for project-specific guidance on Nimonic 75 nuts selection and pricing.
Nimonic 75 hex nuts are available to DIN 934 (metric), ISO 4032, ASME B18.2.2 (inch hex and heavy hex), and BS 1768 (BSW/BSF). Custom thread forms and prevailing torque types can be supplied on request with a typical lead time of 2-3 weeks.
Nickel-based anti-seize compound (such as Molykote P-37 or Jet-Lube Pure Nickel) is recommended for Nimonic 75 nuts. Apply to threads and nut face to prevent galling and seizing at high temperatures. Avoid copper-based anti-seize to prevent galvanic corrosion.
Yes – Nimonic 75 nuts are engineered for continuous service up to 1000°C, maintaining mechanical strength and resisting oxidation and scaling. They are widely used in gas turbines, furnaces, and heat treatment equipment for this reason.
No MOQ for standard sizes (M8-M24) held in stock – single pieces can be supplied for urgent maintenance. Custom sizes or non-standard threads typically require a 10 kg minimum batch. Price breaks are available at 50, 200, and 500 pieces.

Industrial Cities We Serve:

  • Ahmedabad
  • Aurangabad
  • Bengaluru
  • Chennai
  • Coimbatore
  • Faridabad
  • Gandhidham
  • Greater Noida
  • Gurugram
  • Hazira
  • Hosur
  • Hyderabad
  • Jamnagar
  • Jamshedpur
  • Ludhiana
  • Mumbai
  • Mundra
  • Mysuru
  • Nagpur
  • Nashik
  • Navi Mumbai
  • Noida
  • Pune
  • Rajkot
  • Sanand
  • Surat
  • Thane
  • Tiruppur
  • Vadodara
  • Visakhapatnam

Countries We Export To:

  • US
  • Canada
  • Mexico
  • Germany
  • UK
  • France
  • Italy
  • Spain
  • Netherlands
  • Belgium
  • Poland
  • Sweden
  • Norway
  • Denmark
  • Turkey
  • UAE
  • Saudi Arabia
  • Qatar
  • Oman
  • Kuwait
  • Bahrain
  • South Africa
  • Egypt
  • Nigeria
  • Australia
  • New Zealand
  • Singapore
  • Malaysia
  • Indonesia
  • Thailand
  • Vietnam
  • South Korea
  • Japan
  • Brazil