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ISO 9001:2015 · UNS N06075–N07263 · AMS 5765–AMS 5872

Nimonic Fasteners Manufacturer, Supplier & Exporter of High Performance Fasteners

Nimonic fasteners are high-performance nickel-chromium superalloy fasteners engineered for extreme temperature service in aerospace and gas turbine applications. We supply Nimonic 75, 80A, 90, 105 and 263 fasteners worldwide.
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5

Grades

30

Products

-196°C

Min Temp

1204°C

Max Temp

1241 MPa

Min tensile strength · Nimonic 90 per AMS 5829

Excellent

High-temperature oxidation & creep resistance

8.18 g/cm³

Density (avg) · Ni-Cr-Co superalloy

The gas turbine superalloy explained

What is Nimonic Fasteners?

Nimonic is a family of precipitation-hardened nickel-chromium-cobalt superalloys developed by the Henry Wiggin Company (now Special Metals), engineered for gas turbine blade, disc and fastener applications requiring exceptional creep rupture strength above 700°C. The alloy series — including Nimonic 75, 80A, 90 and 263 — derives its high-temperature strength from controlled precipitation of gamma-prime (Ni₃Al,Ti) phase during age hardening. Nimonic fasteners are specified for aero-engine turbine casing bolting, industrial gas turbine combustion hardware and high-temperature furnace structural applications where Inconel 718 reaches its temperature limit at approximately 700°C. Nimonic 80A (UNS N07080) and Nimonic 90 (UNS N07090) are the primary turbine fastener grades, manufactured to AMS 5765 and AMS 5829 respectively with full aerospace material traceability.
PropertySpecification
Base ElementNickel (Ni)
Cr Content18–21%
Grades75, 80A, 90, 263
Max Service Temperature1204°C (Nimonic 75)
Density8.18–8.37 g/cm³
StandardsBS HR, AMS 5765/5829/5872

Nimonic grades — which do you need?

Different fastener grades and material grades of Nimonic Fasteners provide tailored combinations of mechanical strength, creep resistance, corrosion performance, and high-temperature stability for demanding industrial fasteners and engineering applications. Compare available grades below to support accurate material selection for specific operating environments, design stresses, industries, and reliability requirements.

Grade UNS Max Temp Key Property Service Temp Best Application
Nimonic 80A (Most Popular) UNS N07080 950°C Turbine bolting 950°C Aero gas turbines View grade
Nimonic 90 UNS N07090 980°C High-strength alloy 980°C Aero engines View grade
Nimonic 105 UNS N13105 1000°C Creep resistant 1000°C Turbine discs View grade
Nimonic 263 UNS N07263 900°C Fabrication grade 900°C Combustion cans View grade
Nimonic 75 UNS N06075 1200°C Oxidation resistant 1200°C Furnaces, nuclear View grade
Nimonic 105
Nimonic 263
Nimonic 75
Nimonic 80A
Nimonic 90

Nimonic Fasteners — International Standards & Material Certifications

Nimonic Fasteners from RealBolt Engineering Industries are manufactured to AMS 5765 (Nimonic 80A), AMS 5829 (Nimonic 90), AMS 5872 (Nimonic 263), and BS HR1 (Nimonic 75). All batches ship with full heat treatment records, hardness survey, AMS certification, and first article inspection reports (FAIR) for new aerospace part number qualifications.
Standards
DIN 931 DIN 933 DIN 912 DIN 938 DIN 939 DIN 976-1 DIN 934 DIN 125A ISO 4014 ISO 4017 ISO 4762 ISO 4032 ASME B18.2.1 ASME B18.3 ASME B18.31.2 ASME B18.2.2 IS 1367
Certifications
ISO 9001:2015 AS 9100D NABL Lab AMS Certified MTC 3.1 / 3.2

Nimonic Fasteners Applications — Industries & Use Cases

Nimonic Fasteners from RealBolt Engineering Industries are specified by engineers and procurement teams across demanding industries where exceptional high-temperature creep rupture strength and oxidation resistance for gas turbine blade and disc bolting above 700°C is critical to fastener performance and service life. Primary end-use sectors for Nimonic Fasteners include aerospace gas turbines, industrial power generation turbines, high-temperature furnaces, nuclear reactor internals, and defence — click each industry below to see specific application details and recommended grades.
Nimonic 80A and 90 fasteners are used for high-temperature engine bolting in industrial and aero gas turbines where creep resistance above 700°C and tensile strength exceeding 1000 MPa are simultaneously required. AMS 5663/5765 specifications govern heat treatment.
Nimonic 90 and 263 fasteners are specified for industrial gas turbine combustion chamber canning, transition duct hardware and first-stage turbine blade retaining ring bolts operating above 900°C.
Nimonic 75 is used for furnace muffle supports, radiant tube end caps and heat treating basket hardware up to 1200°C where high oxidation resistance is required without the high strength of 80A or 90.
Nimonic alloy fasteners are used in advanced gas-cooled reactor (AGR) core components and research reactor structural hardware requiring creep resistance at elevated temperature with full nuclear material traceability.
Nimonic 80A and 90 fasteners are used in land-speed record vehicle exhaust structures, military jet exhaust systems and hypersonic vehicle components where temperature above 700°C eliminates titanium and Inconel 718 as options.

Nimonic vs Inconel 718 vs Hastelloy X

This comparison table supports aerospace engineers and gas turbine designers in evaluating Nimonic Fasteners against Inconel 718 and Hastelloy X based on maximum continuous service temperature, creep rupture strength, room-temperature tensile strength, applicable AMS specification, cost-per-fastener, and suitability for turbine casing bolting, combustion hardware, and high-temperature furnace structural applications. Use this data to make an informed alloy selection for your specific operating environment, design code, and budget — or contact RealBolt’s technical team for a project-specific recommendation.
Property Nimonic 90 Inconel 718 Hastelloy X
Max service temp 980°C 700°C 1204°C
Tensile strength (min) 1241 MPa 1241 MPa 793 MPa
Creep resistance Excellent Good Good
AMS specification AMS 5829 AMS 5663 AMS 5536
Primary application Turbine disc bolting Structural aerospace Combustion zone
Relative cost Very High Very High Very High

Verdict: Nimonic 90 is the choice for maximum creep strength in turbine disc bolting above 700°C. Inconel 718 provides excellent mechanical properties below 700°C at similar cost. Hastelloy X is preferred for combustion zone hardware above 1000°C.

Need Nimonic fasteners? Get a competitive price today.

Partner with RealBolt Engineering Industries for certified Nimonic Fasteners backed by full EN 10204 material test reports, competitive pricing, and reliable global delivery from our Mumbai facility. Our aerospace and gas turbine technical team supplies AMS 5765 Nimonic 80A, AMS 5829 Nimonic 90, and AMS 5872 Nimonic 263 Fasteners with full heat treatment records, hardness surveys, first article inspection reports, and AS 9100D traceability — in custom-machined sizes and silver-plated threads on request for high-temperature galling prevention. Request a quote today and receive a competitive price within 24 hours.
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Nimonic Fasteners — Common Questions Answered by Our Technical Team

Browse the expert answers below to the most frequently asked questions about Nimonic Fasteners — covering Nimonic vs Inconel 718 above 700°C selection, AMS 5765/5829/5872 certification, heat treatment requirements, galling prevention at turbine temperatures, creep rupture data, maximum service temperatures by grade, and first article inspection (FAIR) report availability. If your question is not answered here, contact the RealBolt technical team directly for grade-specific guidance, project support, and competitive pricing on Nimonic Fasteners.
Both are nickel-chromium superalloys but Nimonic alloys contain more cobalt (up to 21%) and are precipitation-hardened with Ti and Al additions, giving superior creep rupture strength above 700C. Nimonic 80A and 90 are standard in gas turbine blade and disc bolting; Inconel 718 is preferred for structural aerospace fasteners below 700C where highest tensile strength is needed.
Nimonic fasteners are supplied in the precipitation-hardened condition. Nimonic 80A: solution treat at 1080C + age at 700C/16h. Nimonic 90: solution treat at 1080C + age at 700C/16h or stabilize at 750C/24h. Full heat treatment records and hardness surveys are supplied with MTC.
Nimonic 75 retains structural properties to 1200C for furnace hardware. Nimonic 80A and 90 are used to 950C for turbine bolting – above this, more advanced superalloys (MAR-M, Waspaloy) are required. Nimonic 263 combustion chamber fasteners operate at up to 900C with thermal barrier coatings.
Yes. We supply Nimonic 80A (AMS 5765), Nimonic 90 (AMS 5829) and Nimonic 263 (AMS 5872) fasteners with full AMS certification, heat treatment records, chemical analysis, tensile/hardness test results. First Article Inspection (FAIR) reports are available for new part number qualifications.

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