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Nimonic 90 Nuts Manufacturer & Exporter in India

Explore Nimonic 90 Nuts Manufacturer & Exporter in India manufactured for demanding industrial applications with reliable strength, corrosion resistance and compliance with international standards.
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-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 90 Nuts?

Nimonic 90 nuts are high-strength, nickel-chromium-cobalt alloy fasteners manufactured from UNS N07090 bar stock conforming to ASTM B637. Designed for extreme temperature and stress environments, these nuts offer exceptional resistance to oxidation and creep up to 950°C. The alloy’s precipitation-hardening via titanium and aluminium ensures high tensile and fatigue strength, making Nimonic 90 nuts a preferred choice for gas turbine, aerospace, and high-temperature bolted assemblies.

With a balanced composition of nickel, chromium, cobalt, and strengthening elements, Nimonic 90 nuts maintain their mechanical integrity under cyclic loading and aggressive thermal conditions. They are widely specified for critical joints in turbine engines, nuclear reactors, and petrochemical plants where standard stainless steel or Inconel fasteners are inadequate.

Quick Specifications

MaterialNimonic 90
UNS NumberN07090
DIN Number2.4632
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 Strength965 MPa (140 ksi) min
Yield Strength585 MPa (85 ksi) min
HardnessMax 38 HRC / 350 HB
? All material certified by NABL-accredited laboratory. PMI and hardness survey available on request.

Complete the Fastener Set

Other Nimonic 90 Fastener Products Available from RealBolt

RealBolt also manufactures the complete Nimonic 90 fastener range from certified nickel-chromium-cobalt superalloy bar stock, including Nimonic 90 Bolts, Nimonic 90 Screws, Nimonic 90 Washers, Nimonic 90 Studs, and Nimonic 90 Threaded Rods. All Nimonic 90 fastener types are produced to ASTM with full EN 10204 MTC 3.1/3.2 documentation.
Nimonic 90 Bolts
Nimonic 90 Screws
Nimonic 90 Washers
Nimonic 90 Studs
Nimonic 90 Threaded Rods

Technical Data

Nimonic 90 Nuts Dimensions, Sizes & Thread Standards

Nimonic 90 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 dimensions per ASME B18.2.2. All Nimonic 90 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)
M61.0105.0
M81.25136.5
M101.5178.0
M121.751910.0
M162.02413.0
M202.53016.0
M243.03619.0
M303.54624.0
M364.05529.0
M424.56534.0
M485.07538.0
M565.58545.0
M646.09551.0

Dimensional & Material Standards

StandardCoversThread
DIN 934Hex nutsMetric
ISO 4032Hex nutsMetric
ASME B18.2.2Hex & heavy hex nutsUNC/UNF
ISO 2320Prevailing torque nutsMetric
ISO 7042All-metal lock nutsMetric
Material StandardRequirement
ASTM B637Bar/rod - UNS N07090
AMS 5829Forging/fastener
EN 10204 3.1Mill test certificate
EN 10204 3.2TPI-witnessed MTC

Material Chemistry

Nimonic 90 Chemical Composition

Nimonic 90 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)= 53.0%
Chromium (Cr)18.0-21.0%
Cobalt (Co)15.0-21.0%
Titanium (Ti)2.0-3.0%
Aluminium (Al)1.0-2.0%
Iron (Fe)1.5% max
Carbon (C)0.13% max
Manganese (Mn)1.0% max
Silicon (Si)1.0% max
Zirconium (Zr)0.2% max
Boron (B)0.02% max
? All heats verified by NABL-accredited spectrometry. PMI available on request.

Why Nimonic 90 Alloy Composition Matters for Nuts

Cr + Co — High-Temperature Strength
Chromium and cobalt provide Nimonic 90 nuts with outstanding oxidation resistance and mechanical strength at temperatures up to 950°C, ensuring joint integrity in turbine and exhaust assemblies.
Ti + Al — Precipitation Hardening
Titanium and aluminium enable ?' precipitation hardening, delivering high tensile and fatigue strength. This is critical for nuts subjected to cyclic thermal and mechanical loads in aerospace and power generation.
Low Fe, Mn, Si — Corrosion & Creep Resistance
Strict control of iron, manganese, and silicon content ensures maximum resistance to intergranular corrosion and creep deformation, even under prolonged high-temperature exposure.

Fastener Performance

Nimonic 90 Nuts Mechanical Properties & Torque Reference

The table below lists mechanical properties and torque reference for Nimonic 90 Nuts per ASTM. Nimonic 90 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)
M129035
M1622080
M20440130
M24780190
M301550300
M362700430
M424300600
M486400800
?? Anti-galling: Use nickel-based anti-seize (Molykote P-37 or equivalent). Lubricated values assume K=0.15. Avoid copper-based anti-seize on nickel alloys.

Industry Applications

Nimonic 90 Nuts Applications — Industries & End Uses

Nimonic 90 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 90 nuts are the industry standard for securing turbine blades, combustion chamber assemblies, and exhaust manifolds in jet engines and gas turbines. Their high-temperature strength and oxidation resistance ensure reliable performance in critical aerospace applications.
Used in bolted joints of gas and steam turbine casings, HRSG ducting, and high-temperature valve assemblies. Nimonic 90 nuts maintain preload and resist creep under cyclic thermal loads, making them ideal for power plant hardware.
Specified for reactor closures, reformer tube supports, and high-pressure flange connections exposed to aggressive process media and elevated temperatures where stainless steel fasteners fail.
Nimonic 90 nuts are used in nuclear steam generator supports, reactor vessel internals, and control rod drive mechanisms, offering long-term stability and resistance to radiation-induced embrittlement.

Nimonic 90 Nuts Standards & International Certifications

Nimonic 90 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 90 Nuts from India's Leading Manufacturer — Get a Competitive Quote Today

Partner with RealBolt — India’s leading manufacturer of certified Nimonic 90 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
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Answers for Buyers

Nimonic 90 Nuts — Frequently Asked Questions

Browse expert answers to common questions about Nimonic 90 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 90 nuts selection and pricing.
Nimonic 90 hex nuts are available to DIN 934 (metric), ISO 4032, and ASME B18.2.2 (inch hex and heavy hex). Lock nuts and prevailing torque nuts can be supplied to ISO 7042 and ISO 2320. Custom thread forms (UNC, UNF, BSF, Whitworth) are available on request with short lead times.
Nickel-based anti-seize compound (such as Molykote P-37 or Jet-Lube Pure Nickel) is recommended for Nimonic 90 nuts. Apply to threads and nut face to prevent galling and seizing at high temperatures. Avoid copper-based anti-seize to prevent galvanic corrosion with nickel alloys.
Yes – Nimonic 90 nuts are specifically engineered for high-temperature, high-stress environments such as gas turbines and jet engines. They retain mechanical strength and resist oxidation up to 950°C, making them ideal for turbine blade, combustor, and exhaust flange assemblies.
No formal MOQ for standard sizes (M8-M24) held in stock – single pieces can be supplied for urgent maintenance. Custom sizes or special thread forms 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