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Nimonic 263 Screws Manufacturer & Exporter in India

Explore Nimonic 263 Screws 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 263 Screws?

Nimonic 263 screws are high-strength, nickel-cobalt-chromium-molybdenum alloy fasteners manufactured from UNS N07263 bar stock conforming to ASTM B637. Designed for service up to 800°C, these screws offer a unique combination of age-hardened strength and excellent oxidation and thermal fatigue resistance. The alloy’s controlled additions of titanium and aluminum enable precipitation hardening, while molybdenum and cobalt enhance creep and stress rupture properties.

Nimonic 263 screws are widely specified in gas turbine engines, petrochemical reactors, and high-temperature pressure vessels where both mechanical reliability and corrosion resistance are critical. All fasteners are supplied with full traceability and EN 10204 3.1 certification.

Quick Specifications

MaterialNimonic 263
UNS NumberN07263
DIN Number2.4650
Material StandardASTM B637
Screw Standard (Metric)DIN 912 / DIN 7991 / ISO 4762
Screw Standard (Inch)ASME B18.3
Thread FormISO Metric / UNC / UNF
Diameter RangeM4-M48 / #8-2"
Tensile Strength930 MPa (135 ksi) min
Yield Strength585 MPa (85 ksi) min
HardnessMax 32 HRC / 300 HB
? All material certified by NABL-accredited laboratory. PMI and hardness survey available on request.

Complete the Fastener Set

Other Nimonic 263 Fastener Products Available from RealBolt

RealBolt also manufactures the complete Nimonic 263 fastener range from certified nickel-chromium-cobalt superalloy bar stock, including Nimonic 263 Bolts, Nimonic 263 Nuts, Nimonic 263 Washers, Nimonic 263 Studs, and Nimonic 263 Threaded Rods. All Nimonic 263 fastener types are produced to ASTM with full EN 10204 MTC 3.1/3.2 documentation.
Nimonic 263 Bolts
Nimonic 263 Nuts
Nimonic 263 Washers
Nimonic 263 Studs
Nimonic 263 Threaded Rods

Technical Data

Nimonic 263 Screws Dimensions, Sizes & Thread Standards

Nimonic 263 Screws are available in metric M6–M100 and inch ¼″–4″ as standard. Per DIN 912 (socket head cap), DIN 7991 (countersunk), ISO 4762. Custom lengths in 5mm increments. Inch dimensions available per ASME B18.3. All Nimonic 263 screws dimensions are verified against applicable DIN, ISO, and ASME B18 standards

Socket Head Cap Screw Dimensions - Metric (DIN 912 / ISO 4762)

Size (M)Pitch (mm)Head Dia (mm)Head Ht (mm)Hex Socket (mm)Min L (mm)Max L (mm)
M40.77.04.03.0860
M61.010.06.05.010120
M81.2513.08.06.012200
M101.516.010.08.016250
M121.7518.012.010.020300
M162.024.016.014.025400
M202.530.020.017.030500
M243.036.024.019.040600
M303.545.030.022.050800
M364.054.036.027.0601000
M424.563.042.032.0801200
M485.072.048.036.01001500

Dimensional & Material Standards

StandardCoversThread
DIN 912Socket head cap screwsMetric
DIN 7991Countersunk socket screwsMetric
ISO 4762Socket head cap screwsMetric
ASME B18.3Socket cap, flat, button headUNC/UNF
Material StandardRequirement
ASTM B637Bar/rod - UNS N07263
AMS 5872Sheet/plate/strip
AMS 5966Forgings
EN 10204 3.1Mill test certificate
EN 10204 3.2TPI-witnessed MTC

Material Chemistry

Nimonic 263 Chemical Composition

Nimonic 263 Screws 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)49.0 min
Cobalt (Co)19.0-21.0
Chromium (Cr)19.0-21.0
Molybdenum (Mo)5.6-6.1
Titanium (Ti)1.9-2.4
Aluminum (Al)0.5-0.6
Iron (Fe)0.7 max
Carbon (C)0.04-0.08
Silicon (Si)0.4 max
Manganese (Mn)0.6 max
Boron (B)0.005-0.015
Zirconium (Zr)0.02-0.06
? All heats verified by NABL-accredited spectrometry. PMI available on request.

Why Nimonic 263 Alloy Composition Matters for Screws

Co & Cr (19–21%) — Oxidation & Hot Corrosion Resistance
Cobalt and chromium provide Nimonic 263 screws with outstanding resistance to oxidation and hot corrosion at temperatures up to 800°C, making them ideal for gas turbine and exhaust applications.
Mo (5.6–6.1%) — Creep Strength
Molybdenum enhances the alloy’s creep and stress rupture properties, ensuring screw integrity under sustained high loads and thermal cycling.
Ti & Al — Precipitation Hardening
Titanium and aluminum enable age-hardening, delivering high tensile and yield strength after heat treatment, while maintaining ductility for reliable assembly and service.

Fastener Performance

Nimonic 263 Screws Mechanical Properties & Torque Reference

The table below lists mechanical properties and torque reference for Nimonic 263 Screws per ASTM. Nimonic 263 screws achieve 620 MPa tensile strength, with hardness, yield, and elongation values verified by NABL-accredited testing and reported in the EN 10204 MTC.

Screw SizeDry (Nm)Lubricated (Nm)Clamp Load (kN)
M613107.5
M8322514
M10645123
M121108834
M1627021668
M20530424106
M24920736153
M3018001440245
?? 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 263 Screws Applications — Industries & End Uses

Nimonic 263 Screws 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 263 screws are widely used for turbine case assemblies, combustor liners, and afterburner hardware in jet engines, where high-temperature strength and oxidation resistance are essential. Qualified to Rolls-Royce MSRR and Pratt & Whitney specifications.
Socket head screws for high-temperature reactor closures, reformer tube supports, and catalyst basket assemblies in hydrogen, ammonia, and syngas plants. Nimonic 263 resists carburization and sulfidation in process environments.
Fasteners for heat recovery steam generator (HRSG) ductwork, gas turbine exhaust flanges, and boiler tube sheets where thermal cycling and oxidation at 700-800°C are routine.
Used in turbocharger housings, exhaust manifolds, and high-performance engine assemblies where both creep resistance and low thermal expansion are required for reliable service.

Nimonic 263 Screws Standards & International Certifications

Nimonic 263 Screws 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 912 DIN 913 DIN 914 DIN 915 DIN 916 DIN 6912 DIN 7984 ISO 4762 ISO 10642 ISO 14579 ASME B18.3 EN ISO 4762 IS 1367
Certifications
ISO 9001:2015NABL LabPED 2014/68/EUMTC 3.1 / 3.2

Buy Nimonic 263 Screws from India's Leading Manufacturer — Get a Competitive Quote Today

Partner with RealBolt — India’s leading manufacturer of certified Nimonic 263 Screws — 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.
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+91 90226 36025
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Answers for Buyers

Nimonic 263 Screws — Frequently Asked Questions

Browse expert answers to common questions about Nimonic 263 Screws 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 263 screws selection and pricing.
Nimonic 263 socket head screws are available to DIN 912 (metric), ISO 4762, DIN 7991 (countersunk), and ASME B18.3 (inch series). Custom thread forms (UNC, UNF, BSW) and non-standard lengths are available on request with typical lead times of 2-3 weeks.
Nickel-based anti-seize compound (such as Molykote P-37 or Jet-Lube Pure Nickel) is recommended for Nimonic 263 screws. Apply to threads and bearing surfaces to prevent galling. Avoid copper-based anti-seize to prevent galvanic corrosion with nickel alloys.
Yes – Nimonic 263 screws are specifically engineered for high-temperature service up to 800°C, with excellent oxidation and thermal fatigue resistance. They are widely used in turbine engines, exhaust systems, and HRSGs where both strength and corrosion resistance are critical.
No formal MOQ for standard metric sizes (M6-M24) held in stock – single piece orders are accepted for urgent maintenance. Custom sizes or non-standard threads typically require a 10 kg minimum batch. Quantity discounts apply 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