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Copper C11000 (ETP) Bolts Manufacturer & Exporter in India

Explore Copper C11000 (ETP) Bolts 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 C11000 (ETP) Bolts?

Copper C11000 (ETP) bolts are high-conductivity fasteners manufactured from electrolytic tough pitch copper, UNS C11000, conforming to ASTM B187 and ASTM F468 standards. With a minimum copper content of 99.90%, these bolts offer exceptional electrical and thermal conductivity, making them the preferred choice for electrical, earthing, and busbar connections.

C11000 copper bolts are non-magnetic, corrosion-resistant in most environments, and exhibit excellent ductility for easy installation. They are widely specified for electrical switchgear, transformer terminals, and grounding systems where low resistance and reliable conductivity are critical.

Quick Specifications

MaterialCopper C11000 (ETP)
UNS NumberC11000
DIN Number2.0060
Material StandardASTM B187
Bolt Standard (Metric)DIN 933 / DIN 931 / ISO 4017
Bolt Standard (Inch)ASME B18.2.1
Thread FormISO Metric / UNC / UNF
Diameter RangeM6-M48 / ¼"-2"
Tensile Strength210 MPa (30 ksi) min
Yield Strength69 MPa (10 ksi) min
Hardness50-80 HV (annealed)
? All material certified by NABL-accredited laboratory. Electrical conductivity tested per ASTM E1004.

Complete the Fastener Set

Other Copper C11000 (ETP) Fastener Products Available from RealBolt

RealBolt also manufactures the complete Copper C11000 (ETP) fastener range from certified copper alloy bar stock, including Copper C11000 (ETP) Nuts, Copper C11000 (ETP) Screws, Copper C11000 (ETP) Washers, Copper C11000 (ETP) Studs, and Copper C11000 (ETP) Threaded Rods. All Copper C11000 (ETP) fastener types are produced to ASTM with full EN 10204 MTC 3.1/3.2 documentation.
Copper C11000 (ETP) Nuts
Copper C11000 (ETP) Screws
Copper C11000 (ETP) Washers
Copper C11000 (ETP) Studs
Copper C11000 (ETP) Threaded Rods

Technical Data

Copper C11000 (ETP) Bolts Dimensions, Sizes & Thread Standards

Copper C11000 (ETP) 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. All Copper C11000 (ETP) 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)
M61.0104.010200
M81.25135.312250
M101.5176.416300
M121.75197.520400
M162.02410.025500
M202.53012.530600
M243.03615.040600
M303.54618.750800
M364.05522.5601000
M424.56526.0801000
M485.07530.01001200

Dimensional & Material Standards

StandardCoversThread
DIN 933Hex bolts, full threadMetric
DIN 931Hex bolts, partial threadMetric
ISO 4017Hex head screws, fullMetric
ISO 4014Hex head screws, partialMetric
ASME B18.2.1Hex & heavy hex boltsUNC/UNF
Material StandardRequirement
ASTM B187Bar/rod - UNS C11000
ASTM F468Fastener mechanical
EN 13601Copper rod for electrical purposes
EN 10204 3.1Mill test certificate
EN 10204 3.2TPI-witnessed MTC

Material Chemistry

Copper C11000 (ETP) Chemical Composition

Copper C11000 (ETP) 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

ElementComposition (%)
Copper (Cu)99.90% min
Silver (Ag)0.002% min
Oxygen (O)0.02-0.04%
Other Elements0.05% max (total)
? All heats verified by NABL-accredited spectrometry. Conductivity tested per ASTM E1004.

Why Copper C11000 (ETP) Alloy Composition Matters for Bolts

99.90% Cu — Maximum Conductivity
The high copper content ensures electrical conductivity = 101% IACS, making C11000 bolts ideal for busbar, transformer, and switchgear connections where minimal resistance is critical.
Oxygen Content — ETP Grade
Oxygen (0.02–0.04%) improves electrical conductivity but limits weldability. C11000 bolts are best for mechanical and bolted electrical joints, not for welding or brazing.
Trace Silver — Enhanced Performance
Silver content, though minimal, further boosts conductivity and resistance to tarnishing, ensuring long-term reliability in electrical installations.

Fastener Performance

Copper C11000 (ETP) Bolts Mechanical Properties & Torque Reference

The table below lists mechanical properties and torque reference for Copper C11000 (ETP) Bolts per ASTM. Copper C11000 (ETP) 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 SizeDry (Nm)Lubricated (Nm)Clamp Load (kN)
M6434.5
M81088.5
M10201613.5
M12352819.5
M16705632.5
M2014011251.5
M2424019274.5
M30480384120.5
?? Soft metal: Use low torque and flat washers to prevent deformation. Lubricated values assume K=0.15. Avoid overtightening.

Industry Applications

Copper C11000 (ETP) Bolts Applications — Industries & End Uses

Copper C11000 (ETP) 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.
Copper C11000 (ETP) bolts are the industry standard for busbar joints, transformer terminals, switchgear assemblies, and earthing connections. Their high conductivity ensures minimal voltage drop and reliable current transfer in power distribution panels and substations.
Used for bonding and connecting copper strips in HVAC ducting, lightning protection systems, and surge arrestor assemblies. The corrosion resistance and conductivity of C11000 copper ensure long-term performance in exposed environments.
Copper bolts are specified for track bonding, signal grounding, and electrical connections in railway infrastructure, ensuring low-resistance paths for safety and operational reliability.
Essential for grounding racks, cable trays, and equipment in telecom towers and data centers, where stable, low-resistance connections are critical for sensitive electronics.

Copper C11000 (ETP) Bolts Standards & International Certifications

Copper C11000 (ETP) 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
ISO 9001:2015RoHS CompliantNABL LabPED 2014/68/EUMTC 3.1 / 3.2

Buy Copper C11000 (ETP) Bolts from India's Leading Manufacturer — Get a Competitive Quote Today

Partner with RealBolt — India’s leading manufacturer of certified Copper C11000 (ETP) 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.
022-6743-7972
+91 90226 36025
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Answers for Buyers

Copper C11000 (ETP) Bolts — Frequently Asked Questions

Browse expert answers to common questions about Copper C11000 (ETP) 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 C11000 (ETP) bolts selection and pricing.
Copper C11000 (ETP) bolts are available to DIN 933 (full thread), DIN 931 (partial thread), ISO 4017/4014, and ASME B18.2.1 (inch hex and heavy hex). Custom thread forms (UNC, UNF, BSW) and non-standard lengths are available on request with short lead times.
Yes – Copper C11000 (ETP) bolts are ideal for outdoor earthing and lightning protection systems due to their high conductivity and corrosion resistance. For aggressive environments, tin-plated or silver-plated options are available to further enhance durability.
No – ETP copper contains oxygen, which can cause embrittlement during welding or brazing. These bolts are best used for mechanical and bolted electrical joints. For weldable copper fasteners, specify OFHC (C10200) grade.
No MOQ for standard sizes (M6-M24) held ex-stock – we supply from single pieces for urgent requirements. Custom sizes or special finishes may require a minimum order of 10 kg. 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