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Copper C10100 (OFE) Washers Manufacturer & Exporter in India

Explore Copper C10100 (OFE) Washers 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) Washers?

Copper C10100 (OFE) washers are precision flat washers manufactured from Oxygen-Free Electronic (OFE) copper, designated as UNS C10100. This grade is renowned for its ultra-high purity (99.99% Cu min), exceptional electrical and thermal conductivity, and excellent ductility. C10100 washers are produced to ASTM B152 and B187 standards, ensuring consistent mechanical and dimensional properties for demanding electrical, vacuum, and cryogenic applications.

OFE copper washers are non-magnetic, non-sparking, and exhibit outstanding resistance to hydrogen embrittlement and stress corrosion cracking. They are the preferred choice for high-integrity electrical contacts, vacuum flange seals, and ultra-high vacuum (UHV) assemblies in semiconductor, scientific, and power transmission industries.

Quick Specifications

MaterialCopper C10100 (OFE)
UNS NumberC10100
DIN Number2.0040
Material StandardASTM B152 / B187
Washer Standard (Metric)DIN 125 / DIN 9021 / ISO 7089
Washer Standard (Inch)ASME B18.22.1
TypeFlat, Spring, Sealing, Custom
Size RangeM2-M100 / 1/8"-4"
Tensile Strength220 MPa (32 ksi) min
Yield Strength69 MPa (10 ksi) min
Hardness40-65 HV (annealed)
? All washers supplied with full traceability and laboratory-certified composition. Custom dimensions available.

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) Nuts, Copper C10100 (OFE) Screws, 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) Nuts
Copper C10100 (OFE) Screws
Copper C10100 (OFE) Studs
Copper C10100 (OFE) Threaded Rods

Technical Data

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

Copper C10100 (OFE) Washers are available in metric M6–M100 and inch ¼″–4″ as standard. Manufactured to DIN 125 (flat), DIN 9021 (large OD), ISO 7089, and ASME B18.22.1. Custom OD/ID/thickness available. Inch and metric sizes supplied. All Copper C10100 (OFE) washers dimensions are verified against applicable DIN, ISO, and ASME

Flat Washer Dimensions - Metric (DIN 125 / ISO 7089)

Size (M)ID (mm)OD (mm)Thickness (mm)
M22.250.3-1.0
M44.390.8-1.0
M66.4121.0-1.6
M88.4161.6-2.0
M1010.5202.0-2.5
M1213.0242.5-3.0
M1617.0303.0-4.0
M2021.0373.0-4.0
M2425.0444.0-5.0
M3031.0565.0-6.0
M3637.0666.0-7.0
M4243.0787.0-8.0
M4849.0928.0-9.0
M5657.01059.0-10.0
M6465.011510.0-12.0
M8081.014012.0-14.0
M100101.018014.0-16.0

Dimensional & Material Standards

StandardCoversType
DIN 125Flat washersMetric
DIN 9021Large OD washersMetric
ISO 7089Flat washersMetric
ASME B18.22.1Plain washersInch
BS 4320Metric washersMetric
Material StandardRequirement
ASTM B152Plate/sheet - C10100
ASTM B187Rod/bar - C10100
EN 13601Copper rod/bar
EN 1652Copper sheet/plate
EN 10204 3.1Mill test certificate

Material Chemistry

Copper C10100 (OFE) Chemical Composition

Copper C10100 (OFE) Washers 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 B152/B187

ElementComposition (%)
Copper (Cu)99.99% min
Oxygen (O)0.0005% max
Silver (Ag)0.002% max
Other Elements0.001% max (each)
? All heats spectrographically verified for OFE purity. Full PMI and traceability available.

Why Copper C10100 (OFE) Alloy Composition Matters for Washers

Ultra-High Purity (99.99% Cu)
OFE copper’s exceptional purity ensures maximum electrical and thermal conductivity, making these washers ideal for high-current busbar joints, vacuum seals, and sensitive electronic assemblies.
Low Oxygen Content
With oxygen content below 0.0005%, C10100 washers are immune to hydrogen embrittlement and outgassing, critical for UHV and cryogenic sealing applications.
Non-Magnetic & Non-Sparking
The absence of alloying elements ensures C10100 washers are non-magnetic and non-sparking, suitable for use in explosive or high-purity environments.

Fastener Performance

Copper C10100 (OFE) Washers Mechanical Properties & Torque & Proof Load Reference

The table below lists mechanical properties and proof load reference for Copper C10100 (OFE) Washers per ASTM. Copper C10100 (OFE) washers achieve 220 MPa tensile strength, with hardness, yield, and elongation values verified by NABL-accredited testing and reported in the EN 10204 MTC.

Washer SizeRecommended Torque (Nm)Max Clamp Load (kN)
M675.5
M8179.5
M103415.5
M126022.5
M1615038.0
M2029560.0
M2451090.0
?? Soft metal: Avoid over-tightening. Use with compatible copper or brass fasteners for optimal sealing and conductivity.

Industry Applications

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

Copper C10100 (OFE) Washers 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.
Vacuum & UHV Systems
Semiconductor & Cleanroom
Electrical busbar joints, transformer terminals, switchgear assemblies, and high-current connections rely on C10100 washers for their unmatched conductivity and non-magnetic properties. Used in both LV and HV installations.
Used in cryostats, superconducting magnet assemblies, and low-temperature research equipment, C10100 washers maintain ductility and sealing performance at temperatures approaching absolute zero.

Copper C10100 (OFE) Washers Standards & International Certifications

Copper C10100 (OFE) Washers 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 125A DIN 126 DIN 127 ISO 7089 ISO 7090 ASME B18.21.1 BS 4320 IS 5372 IS 1367
Certifications
ISO 9001:2015RoHS CompliantNABL LabPED 2014/68/EUMTC 3.1

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

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

Copper C10100 (OFE) Washers — Frequently Asked Questions

Browse expert answers to common questions about Copper C10100 (OFE) Washers 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) washers selection and pricing.
Copper C10100 (OFE) washers are available to DIN 125 (flat), DIN 9021 (large OD), ISO 7089, ASME B18.22.1 (inch), and BS 4320 (metric). Custom shapes and dimensions can be produced to print or per customer specification, with full certification to ASTM B152/B187 and EN 10204 3.1.
Yes – OFE copper washers are the industry standard for UHV flange seals (CF, KF, ISO) due to their ultra-low outgassing, high purity, and resistance to hydrogen embrittlement. They are compatible with bakeout cycles and maintain sealing integrity at pressures below 10-9 mbar.
Absolutely. C10100 washers offer the highest electrical conductivity (101% IACS) and are non-magnetic, making them ideal for busbar joints, transformer terminals, and switchgear connections where low resistance and stable contact are critical.
No formal MOQ for standard sizes (M4-M24) held in stock – we supply from single pieces for R&D or maintenance. Custom sizes or stamped shapes typically require a 5 kg minimum. Quantity price breaks at 100 pcs, 500 pcs, and 1000 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