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Copper C10100 (OFE) Nuts Manufacturer & Exporter in India

Explore Copper C10100 (OFE) Nuts Manufacturer & Exporter in India manufactured for demanding industrial applications with reliable strength, corrosion resistance and compliance with international standards.
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-100

Min Temp

260

Max Temp

🌡

260

Suitable for continuous service up to approximately 260°C under typical operating conditions.

⚡

220

Typical tensile strength around 220 MPa depending on product form and heat treatment.

🛡

Good

Good corrosion resistance in a wide range of industrial environments.

⚖

8.96

Typical density is approximately 8.96 g/cm³.

Product Overview

What are Copper C10100 (OFE) Nuts?

Copper C10100 (OFE) nuts are precision fasteners manufactured from Oxygen-Free Electronic (OFE) copper, designated as UNS C10100. This grade is renowned for its exceptional electrical and thermal conductivity, as well as its high purity (minimum 99.99% Cu). C10100 nuts are produced in accordance with ASTM B187/B152 standards, ensuring optimal performance in critical electrical, vacuum, and cryogenic applications.

With virtually no oxygen content, Copper C10100 (OFE) nuts are free from embrittlement and hydrogen pickup, making them ideal for ultra-high vacuum (UHV) systems, semiconductor processing, and sensitive electronic assemblies where contamination and outgassing must be minimized.

Quick Specifications

MaterialCopper C10100 (OFE)
UNS NumberC10100
DIN Number2.0040
Material StandardASTM B187 / ASTM B152
Nut Standard (Metric)DIN 934 / ISO 4032
Nut Standard (Inch)ASME B18.2.2
Thread FormISO Metric / UNC / UNF
Diameter RangeM3-M64 / 1/8"-2½"
Tensile Strength220 MPa (32 ksi) min
Yield Strength69 MPa (10 ksi) min
Hardness45 HV max
? All material certified by NABL-accredited laboratory. PMI and conductivity testing available on request.

Complete the Fastener Set

Other Copper C10100 (OFE) Fastener Products Available from RealBolt

RealBolt also manufactures the complete Copper C10100 (OFE) fastener range from certified copper alloy bar stock, including Copper C10100 (OFE) Bolts, Copper C10100 (OFE) Screws, Copper C10100 (OFE) Washers, Copper C10100 (OFE) Studs, and Copper C10100 (OFE) Threaded Rods. All Copper C10100 (OFE) fastener types are produced to ASTM with full EN 10204 MTC 3.1/3.2 documentation.
Copper C10100 (OFE) Bolts
Copper C10100 (OFE) Screws
Copper C10100 (OFE) Washers
Copper C10100 (OFE) Studs
Copper C10100 (OFE) Threaded Rods

Technical Data

Copper C10100 (OFE) Nuts Dimensions, Sizes & Thread Standards

Copper C10100 (OFE) Nuts are available in metric M6–M100 and inch ¼″–4″ as standard. Per DIN 934 (hex nut) / ISO 4032. Custom thread pitches and special geometries available. Inch dimensions per ASME B18.2.2. All Copper C10100 (OFE) nuts dimensions are verified against applicable DIN, ISO, and ASME B18 standards

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

Size (M)Pitch (mm)A/F (mm)Height (mm)
M30.55.52.4
M40.773.2
M50.884.7
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
DIN 439Thin nutsMetric
ISO 4035Thin hex nutsMetric
Material StandardRequirement
ASTM B187Bar/rod - UNS C10100
ASTM B152Plate/sheet - UNS C10100
EN 13601Copper rod for electrical purposes
EN 13602Copper wire for electrical purposes
EN 10204 3.1Mill test certificate

Material Chemistry

Copper C10100 (OFE) Chemical Composition

Copper C10100 (OFE) Nuts are produced from either tin-stabilized Naval Brass C46400 or aluminium-nickel-iron Aluminium Bronze C63000, with elemental limits per ASTM and MIL-B-24059. Tin (0.5–1%) in Naval Brass prevents dezincification in seawater; aluminium and nickel additions in Al Bronze C63000 provide non-sparking ATEX Zone 1 compliance.

Chemical Composition per ASTM B187/B152

ElementComposition (%)
Copper (Cu)99.99% min
Oxygen (O)0.0005% max
Silver (Ag)0.002% max
Other Elements (each)0.001% max
Total Impurities0.01% max
? All heats verified by NABL-accredited spectrometry. Conductivity and oxygen content certified per batch.

Why Copper C10100 (OFE) Alloy Composition Matters for Nuts

Ultra-High Purity — 99.99% Cu
The extremely high copper content ensures maximum electrical and thermal conductivity, making C10100 nuts ideal for busbar, grounding, and high-frequency RF applications where even trace impurities can cause resistance or arcing.
Oxygen-Free — No Embrittlement
With oxygen content below 0.0005%, C10100 (OFE) nuts are immune to hydrogen embrittlement and outgassing, critical for UHV, semiconductor, and cryogenic assemblies where vacuum integrity is paramount.
Low Impurities — No Contamination
Strict impurity limits prevent contamination of sensitive electronic or vacuum systems, ensuring reliable, long-term performance in mission-critical environments.

Fastener Performance

Copper C10100 (OFE) Nuts Mechanical Properties & Torque Reference

The table below lists mechanical properties and torque reference for Copper C10100 (OFE) Nuts per ASTM. Copper C10100 (OFE) nuts achieve 220 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)
M652.5
M8124.8
M10247.8
M124211.2
M1610519.8
M2021031.2
M2436045.0
?? Soft Material: Use calibrated torque wrenches and avoid overtightening. Copper nuts are not suitable for high-stress bolting applications.

Industry Applications

Copper C10100 (OFE) Nuts Applications — Industries & End Uses

Copper C10100 (OFE) Nuts from RealBolt are specified across marine hardware, ATEX hazardous areas, and naval defence where good corrosion resistance and 220 MPa tensile strength are required for reliable fastener performance. Click each industry below for detailed application examples.
Copper C10100 (OFE) nuts are widely used in busbar assemblies, switchgear, transformer terminals, and grounding systems where maximum electrical conductivity and low contact resistance are essential for reliable power transmission and distribution.
OFE copper nuts are specified for UHV chamber flanges, semiconductor process tools, and cryogenic vacuum systems due to their ultra-low outgassing, non-magnetic properties, and resistance to hydrogen embrittlement.
Used in high-frequency RF connectors, waveguide flanges, and microwave cavity assemblies, C10100 nuts ensure minimal signal loss and stable electrical performance in sensitive communications and radar equipment.
Copper C10100 (OFE) nuts are ideal for cryostats, superconducting magnet assemblies, and particle accelerator hardware, providing reliable fastening at extremely low temperatures without loss of ductility or conductivity.

Copper C10100 (OFE) Nuts Standards & International Certifications

Copper C10100 (OFE) 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, Lloyds Register or DNV certification, MIL specification documentation, and PMI (XRF) reports — available on request for all orders.
Standards
DIN 934 ISO 4032 ASME B18.2.2 BS 1768 BS EN ISO 4032 IS 1367
Certifications
ISO 9001:2015NABL LabPED 2014/68/EUMTC 3.1

Buy Copper C10100 (OFE) Nuts from India's Leading Manufacturer — Get a Competitive Quote Today

Partner with RealBolt — India’s leading manufacturer of certified Copper C10100 (OFE) 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

Copper C10100 (OFE) Nuts — Frequently Asked Questions

Browse expert answers to common questions about Copper C10100 (OFE) Nuts from RealBolt — covering alloy selection, ATEX Zone 1 compliance, dezincification resistance, ASTM standard, sizes, and EN 10204 documentation. Contact our technical team directly for project-specific guidance on Copper C10100 (OFE) nuts selection and pricing.
Copper C10100 (OFE) nuts are available to DIN 934 (metric hex), ISO 4032, ASME B18.2.2 (inch hex and heavy hex), and DIN 439/ISO 4035 (thin nuts). Custom thread forms (UNC, UNF, BSW, BSF) and special geometries can be supplied on request with short lead times.
Yes – C10100 (OFE) nuts offer the highest electrical conductivity (101% IACS) of any copper alloy, making them ideal for busbar, transformer, and switchgear connections where minimal voltage drop and low contact resistance are critical. Ensure proper surface preparation for optimal conductivity.
Absolutely. OFE copper nuts are specified for ultra-high vacuum (UHV) and semiconductor process equipment due to their ultra-low outgassing, non-magnetic nature, and resistance to hydrogen embrittlement. All nuts are supplied degreased and can be vacuum-baked on request.
No formal MOQ for standard metric and inch sizes (M4-M24) held ex-stock – we supply from single pieces for R&D and maintenance. Custom sizes or special threads may require a 5 kg minimum. Quantity price breaks at 50 pcs, 200 pcs, and 500 pcs.

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