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Inconel 601 Nuts Manufacturer & Exporter in India

Explore Inconel 601 Nuts Manufacturer & Exporter in India manufactured for demanding industrial applications with reliable strength, corrosion resistance and compliance with international standards.
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-200

Min Temp

1200

Max Temp

🌡

1200

Suitable for continuous service up to approximately 1200°C under typical operating conditions.

⚡

760

Typical tensile strength around 760 MPa depending on product form and heat treatment.

🛡

Excellent

Excellent corrosion resistance in a wide range of industrial environments.

⚖

8.4

Typical density is approximately 8.4 g/cm³.

Product Overview

What are Inconel 601 Nuts?

Inconel 601 nuts are nickel-chromium-aluminium alloy fasteners manufactured from UNS N06601 bar stock conforming to ASTM B166. The alloy’s exceptional oxidation resistance is derived from its aluminium content (1.0-1.7%), which forms a tightly adherent alumina scale that protects the base metal at temperatures up to 1230°C under cyclic thermal conditions.

With a chromium content of 21.0-25.0% and a nickel base of 58.0-63.0%, Inconel 601 nuts maintain structural integrity in high-temperature furnace, combustion, and heat-treatment environments where standard stainless steel fasteners fail rapidly. These nuts are specified under ASTM B166 and ASTM F467 for industrial furnace hardware, thermal processing equipment, and high-temperature flange assemblies worldwide.

Quick Specifications

MaterialInconel 601
UNS NumberN06601
DIN Number2.4851
Material StandardASTM B166
Nut Standard (Metric)DIN 934 / DIN 6915 / ISO 4032
Nut Standard (Inch)ASME B18.2.2
Thread FormISO Metric / UNC / UNF
Size RangeM6-M100 / ¼"-4"
Tensile Strength550 MPa (80 ksi) min
Yield Strength205 MPa (30 ksi) min
HardnessMax 35 HRC / 200 HB
? All material certified by NABL-accredited laboratory. PMI available on request.

Complete the Fastener Set

Other Inconel 601 Fastener Products Available from RealBolt

RealBolt also manufactures the complete Inconel 601 fastener range from certified nickel-chromium superalloy bar stock, including Inconel 601 Bolts, Inconel 601 Screws, Inconel 601 Washers, Inconel 601 Studs, and Inconel 601 Threaded Rods. All Inconel 601 fastener types are produced to ASTM with full EN 10204 MTC 3.1/3.2 documentation.
Inconel 601 Bolts
Inconel 601 Screws
Inconel 601 Washers
Inconel 601 Studs
Inconel 601 Threaded Rods

Technical Data

Inconel 601 Nuts Dimensions, Sizes & Thread Standards

Inconel 601 Nuts are available in metric M6–M100 and inch ¼″–4″ as standard. Per DIN 934 (hex nuts) / DIN 6915 (heavy hex) / ISO 4032. Custom sizes available. Inch dimensions per ASME B18.2.2. All Inconel 601 nuts dimensions are verified against applicable DIN, ISO, and ASME B18 standards before

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

Size (M)Pitch (mm)A/F (mm)Nut Height (mm)A/C (mm)
M61.0105.011.05
M81.25136.514.38
M101.5178.018.90
M121.751910.020.03
M162.02413.026.75
M202.53016.032.95
M243.03619.039.55
M303.54624.050.85
M364.05529.060.79
M424.56534.071.30
M485.07538.082.60
M565.58545.093.56
M646.09551.0104.86
M726.010558.0116.16
M806.011564.0127.46
M1006.014580.0160.00

Dimensional & Material Standards

StandardCoversThread
DIN 934Hex nuts, standard heightMetric
DIN 6915Heavy hex nuts, structuralMetric
ISO 4032Hex nuts, style 1Metric
ISO 4033Hex nuts, style 2 (high)Metric
ASME B18.2.2Hex & heavy hex nutsUNC/UNF
ASME B16.5Heavy hex nuts for flangesUNC
MSS SP-75Heavy hex nuts, high-pressureUNC
Material StandardRequirement
ASTM B166Bar/rod - UNS N06601
ASTM F467Fastener mechanical properties
EN 10204 3.1Mill test certificate
EN 10204 3.2TPI-witnessed MTC
ISO 9001:2015Quality management system

Material Chemistry

Inconel 601 Chemical Composition

Inconel 601 Nuts are manufactured from a nickel-chromium superalloy containing nickel (72% min), chromium (14–17%), and iron (6–10%). Each element is precisely controlled per ASTM — nickel provides chloride SCC immunity, chromium drives high-temperature oxidation resistance, and iron balances structural stability and alloy cost.

Chemical Composition per ASTM B166

ElementComposition (%)
Nickel (Ni)58.0-63.0%
Chromium (Cr)21.0-25.0%
Iron (Fe)Balance (approx. 14.0%)
Aluminium (Al)1.0-1.7%
Carbon (C)0.10% max
Manganese (Mn)1.0% max
Silicon (Si)0.50% max
Copper (Cu)1.0% max
Sulphur (S)0.015% max
? All heats verified by NABL-accredited spectrometry. PMI available on request.

Why Inconel 601 Alloy Composition Matters for Nuts

Al (1.0–1.7%) — Oxidation Barrier at Extreme Temperatures
Aluminium forms a dense, self-healing alumina (Al2O3) scale on the nut surface during high-temperature exposure. This scale prevents oxygen ingress and maintains thread integrity in cyclic furnace environments up to 1230°C — a capability no standard stainless steel nut can replicate.
Cr (21.0–25.0%) — Carburisation and Sulphidation Resistance
The elevated chromium content provides robust resistance to carburisation in hydrocarbon atmospheres and sulphidation in combustion gas streams. Inconel 601 nuts retain their thread form and clamping load in environments that rapidly degrade 310 stainless steel hardware.
Ni (58.0–63.0%) — Thermal Fatigue Resistance
The high nickel base gives Inconel 601 nuts excellent resistance to thermal fatigue cracking under repeated heating and cooling cycles. Nuts maintain dimensional stability and do not seize onto mating bolts even after prolonged service at elevated temperatures.

Fastener Performance

Inconel 601 Nuts Mechanical Properties & Torque Reference

The table below lists mechanical properties and torque reference for Inconel 601 Nuts per ASTM. Inconel 601 nuts achieve 760 MPa tensile strength, with hardness, yield, and elongation values verified by NABL-accredited testing and reported in the EN 10204 MTC.

Tightening Torque Reference - Inconel 601 Nuts (Metric)

Nut SizeDry (Nm)Lubricated (Nm)Clamp Load (kN)
M12625022
M1614811854
M2029523686
M24510408124
M301020816198
M3617801424288
M4228402272396
M4842103368521
?? Anti-galling: Use nickel-based anti-seize (Molykote P-37 or equivalent). Lubricated values assume K=0.15. Never use copper-based anti-seize on nickel alloy fasteners.

Industry Applications

Inconel 601 Nuts Applications — Industries & End Uses

Inconel 601 Nuts from RealBolt are specified across oil and gas, aerospace, chemical processing, and power generation where excellent corrosion resistance and 760 MPa tensile strength are required for reliable fastener performance. Click each industry below for detailed application examples.
Inconel 601 nuts are the preferred fastener for industrial furnace shell flanges, muffle furnace door hardware, retort closures, and radiant tube end fittings. The alumina-forming surface scale prevents thread seizure and maintains clamping load through repeated thermal cycling from ambient to 1200°C – conditions that cause rapid failure in 310 stainless steel nuts.
Hex nuts and heavy hex nuts for atmosphere-controlled furnace fixtures, carburising and nitriding retort assemblies, and sintering furnace structural connections. Inconel 601 resists both the oxidising and reducing atmospheres encountered in continuous belt furnaces and batch box furnaces used in automotive and aerospace heat treatment.
Flange nut sets for reformer outlet manifolds, fired heater tube support connections, and catalytic cracker regenerator flange hardware operating above 900°C. Inconel 601 nuts maintain proof load and resist creep relaxation at temperatures where austenitic stainless steel nuts lose significant clamping force.
Heavy hex nuts for waste-to-energy boiler flange connections, biomass combustion chamber access door hardware, and flue gas duct expansion joint flanges. The alloy’s resistance to chlorine-bearing combustion gases and high-temperature sulphidation makes it the preferred choice over 309 and 310 stainless steel in these aggressive environments.

Inconel 601 Nuts Standards & International Certifications

Inconel 601 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, PMI (XRF), NACE MR0175/ISO 15156, and NABL-accredited lab reports — available on request for all orders.
Standards
DIN 934 ISO 4032 ASME B18.2.2 IS 1364 IS 1367
Certifications
ISO 9001:2015AMS 5715NABL LabPED 2014/68/EUMTC 3.1 / 3.2

Buy Inconel 601 Nuts from India's Leading Manufacturer — Get a Competitive Quote Today

Partner with RealBolt — India’s leading manufacturer of certified Inconel 601 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.
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Answers for Buyers

Inconel 601 Nuts — Frequently Asked Questions

Browse expert answers to common questions about Inconel 601 Nuts from RealBolt — covering ASTM standards, max service temperature, corrosion resistance, available sizes, lead times, and MTC certification. Contact our technical team directly for project-specific guidance on Inconel 601 nuts selection and pricing.
Inconel 601 hex nuts are manufactured to DIN 934 (standard hex, metric), DIN 6915 (heavy hex, metric), ISO 4032 (style 1), ISO 4033 (style 2 high nut), and ASME B18.2.2 (inch hex and heavy hex). Heavy hex nuts for ASME B16.5 flange stud bolt sets are supplied per ASME B18.2.2 with proof load testing per ASTM F467. Custom thread forms including BSW, BSF, and BSPP are available on request with a 15 working day lead time.
Inconel 601 nuts are rated for continuous service up to 1175°C and cyclic oxidation service up to 1230°C. The aluminium content (1.0-1.7%) forms a protective alumina scale that remains stable through repeated heating and cooling cycles. For applications above 1000°C, we recommend specifying heavy hex nuts with increased bearing face area to compensate for the reduction in yield strength at elevated temperature. Creep relaxation data is available on request for critical bolted joint calculations.
Inconel 601 significantly outperforms 310 stainless steel above 900°C. While 310 SS offers reasonable oxidation resistance to approximately 1050°C, it lacks the aluminium-forming oxide scale of alloy 601 and is susceptible to carburisation in hydrocarbon atmospheres. Inconel 601 nuts retain thread integrity and resist seizure after prolonged thermal cycling, whereas 310 SS nuts frequently gall and fuse to mating bolts after repeated high-temperature service. For furnace and combustion applications above 950°C, Inconel 601 is the technically correct specification.
Use a nickel-based anti-seize compound such as Molykote P-37, Jet-Lube KOPR-KOTE Pure Nickel, or Bostik Never-Seez Pure Nickel. Apply to the bolt thread and the nut bearing face before assembly. Reduce target torque values by approximately 20% compared to dry assembly values. Avoid copper-based or zinc-based anti-seize products on nickel alloy fasteners – the galvanic potential difference promotes corrosion at the thread interface, particularly in high-temperature cycling service.

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
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  • Oman
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