Copper C10100 (OFE) Bolts Manufacturer & Exporter in India

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

-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) Bolts?

Copper C10100 (OFE) bolts are high-purity, oxygen-free electronic grade copper fasteners manufactured from UNS C10100 bar stock in accordance with ASTM B187 and ASTM F68. With a minimum copper content of 99.99% and extremely low oxygen (=0.0005%), these bolts offer exceptional electrical and thermal conductivity, making them ideal for critical electrical, vacuum, and cryogenic applications.

OFE copper bolts are non-magnetic, highly ductile, and exhibit excellent resistance to hydrogen embrittlement and stress corrosion cracking. They are widely specified for high-vacuum flanges, electrical busbar connections, and semiconductor manufacturing equipment where absolute purity and conductivity are essential.

Quick Specifications

Material	Copper C10100 (OFE)
UNS Number	C10100
DIN Number	2.0040
Material Standard	ASTM B187
Bolt Standard (Metric)	DIN 933 / DIN 931 / ISO 4017
Bolt Standard (Inch)	ASME B18.2.1
Thread Form	ISO Metric / UNC / UNF
Diameter Range	M4-M48 / ¼"-2"
Tensile Strength	220 MPa (32 ksi) min
Yield Strength	69 MPa (10 ksi) min
Hardness	45 HV (max, annealed)

? All material certified by NABL-accredited laboratory. Spectro and conductivity test reports 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) Nuts, 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) Nuts

Copper C10100 (OFE) Screws

Copper C10100 (OFE) Washers

Copper C10100 (OFE) Studs

Copper C10100 (OFE) Threaded Rods

Technical Data

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

Copper C10100 (OFE) Bolts are available in metric M6–M100 and inch ¼″–4″ as standard. Per DIN 933 (full thread) / DIN 931 (partial thread) / ISO 4017. Custom lengths available in 5mm increments. Inch sizes per ASME B18.2.1 on request. All Copper C10100 (OFE) bolts dimensions conform to applicable DIN, ISO, and ASME B18 standards.

Hex Bolt Dimensions - Metric (DIN 933 / ISO 4017)

Size (M)	Pitch (mm)	A/F (mm)	Head Ht (mm)	Min L (mm)	Max L (mm)
M4	0.7	7	2.8	8	80
M5	0.8	8	3.5	10	100
M6	1.0	10	4.0	12	120
M8	1.25	13	5.3	16	150
M10	1.5	17	6.4	20	200
M12	1.75	19	7.5	25	250
M16	2.0	24	10.0	30	300
M20	2.5	30	12.5	35	350
M24	3.0	36	15.0	40	400
M30	3.5	46	18.7	50	500
M36	4.0	55	22.5	60	600
M42	4.5	65	26.0	70	700
M48	5.0	75	30.0	80	800

Dimensional & Material Standards

Standard	Covers	Thread
DIN 933	Hex bolts, full thread	Metric
DIN 931	Hex bolts, partial thread	Metric
ISO 4017	Hex head screws, full	Metric
ISO 4014	Hex head screws, partial	Metric
ASME B18.2.1	Hex & heavy hex bolts	UNC/UNF

Material Standard	Requirement
ASTM B187	Bar/rod - UNS C10100
ASTM F68	Fastener mechanical
EN 13601	Copper rod for electrical purposes
EN 10204 3.1	Mill test certificate
EN 10204 3.2	TPI-witnessed MTC

Material Chemistry

Copper C10100 (OFE) Chemical Composition

Copper C10100 (OFE) Bolts 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

Element	Composition (%)
Copper (Cu)	99.99% min
Oxygen (O)	0.0005% max
Silver (Ag)	0.002% max
Other Elements (total)	0.001% max

? All heats verified by NABL-accredited spectrometry. Conductivity and purity certificates available on request.

Why Copper C10100 (OFE) Alloy Composition Matters for Bolts

Ultra-High Conductivity

The 99.99% copper content ensures electrical conductivity =101% IACS, making C10100 bolts the preferred choice for busbar, earthing, and high-current electrical connections.

Oxygen-Free for Vacuum & Hydrogen Service

Extremely low oxygen content (=0.0005%) prevents embrittlement and outgassing, allowing use in UHV, semiconductor, and cryogenic assemblies where standard copper would fail.

Non-Magnetic & Non-Sparking

OFE copper bolts are non-magnetic and non-sparking, making them safe for use in sensitive electronic, explosive, and MRI environments.

Fastener Performance

Copper C10100 (OFE) Bolts Mechanical Properties & Torque Reference

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

Bolt Size	Dry (Nm)	Lubricated (Nm)	Clamp Load (kN)
M6	4.5	3.5	2.0
M8	11	8.5	3.5
M10	22	17	5.5
M12	38	30	8.0
M16	90	72	15.0
M20	180	144	24.0
M24	310	248	35.0

?? Anti-seize: Use a silver-based or graphite-based anti-seize for copper bolts. Lubricated values assume K=0.16. Avoid nickel-based compounds to prevent galvanic corrosion in electrical assemblies.

Industry Applications

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

Copper C10100 (OFE) Bolts 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.

Electrical & Power Distribution

Copper Busbar & Earthing Systems

C10100 OFE bolts are the industry standard for connecting copper busbars, earthing grids, and transformer terminals in switchgear, substations, and power plants. Their unmatched conductivity ensures minimal voltage drop and heat generation at bolted joints.

Ultra-High Vacuum & Semiconductor

OFE copper bolts are specified for UHV chamber flanges, semiconductor process equipment, and cryogenic assemblies where outgassing, magnetic interference, and contamination must be avoided. Used in ion implanters, sputtering systems, and particle accelerators.

Railway & Traction Power

Used for bolted connections in railway electrification, third rail, and overhead catenary systems, where high conductivity and corrosion resistance are critical for safety and efficiency.

Medical & MRI Equipment

Copper C10100 (OFE) Bolts Standards & International Certifications

Copper C10100 (OFE) Bolts 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 931 DIN 933 ISO 4014 ISO 4017 ASME B18.2.1 BS 1768 BS 3692 BS 4190 IS 1367

Certifications

DIN 2.0040EN 13601

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

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

Answers for Buyers

Copper C10100 (OFE) Bolts — Frequently Asked Questions

Browse expert answers to common questions about Copper C10100 (OFE) Bolts 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) bolts selection and pricing.

Free technical consultation for electrical applications
Mill Test Certificate and conductivity report included
Export documentation and packing as per IEC/IEEE
Sample orders welcome
Rapid Quotations & Fast Delivery
Factory-direct pricing
Application-specific guidance
Dedicated engineering support

What standards are available for Copper C10100 (OFE) bolts?

Copper C10100 (OFE) bolts are available to DIN 933 (full thread), DIN 931 (partial thread), ISO 4017/4014 (metric), and ASME B18.2.1 (inch hex and heavy hex). Custom thread forms (UNC, UNF, BSW, BSF) and special head styles can be supplied on request with short lead times.

What anti-seize compound should I use with OFE copper bolts?

Use a silver-based or graphite-based anti-seize compound for Copper C10100 (OFE) bolts, especially in electrical or vacuum service. Avoid nickel-based or copper-based anti-seize in high-purity or sensitive electrical assemblies to prevent contamination or galvanic effects.

Are Copper C10100 (OFE) bolts suitable for high-vacuum and cryogenic applications?

Yes - OFE copper bolts are the preferred choice for ultra-high vacuum (UHV), semiconductor, and cryogenic assemblies due to their extremely low outgassing, high purity, and non-magnetic properties. They are widely used in particle accelerators, MRI, and scientific instrumentation.

What is the minimum order quantity (MOQ) for Copper C10100 (OFE) bolts?

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