Comprehensive Overview of Copper Bolts and Copper Hex Bolts
We are one of the leading manufacturers and exporters of Copper Bolts and Copper Hex Bolts from India. We have been supplying precision copper fasteners, copper hex bolts, copper threaded fasteners, and copper hardware to the world market for many decades. Our state-of-the-art manufacturing facility specializes in producing high-quality copper bolts using advanced hot forging technology, cold heading processes, precision CNC thread rolling, thread cutting operations, and comprehensive surface treatment capabilities. With over three decades of global experience in copper fastener manufacturing, we serve diverse industries including electrical copper bolts for bus bar connections, marine copper hex bolts for shipbuilding applications, chemical processing copper fasteners for corrosion-resistant connections, roofing copper bolts for architectural applications, grounding and earthing copper bolts for electrical systems, telecommunications copper hardware, railway copper fasteners, renewable energy copper bolts for solar and wind installations, and industrial copper bolts for specialized equipment. Our expertise encompasses working with various copper grades including pure Copper C11000 bolts offering excellent electrical conductivity and corrosion resistance, Copper C10200 oxygen-free bolts for high-performance applications, Silicon Bronze bolts for marine environments, Aluminum Bronze bolts for superior strength, and Beryllium Copper bolts for high-strength applications. We manufacture copper bolts ranging from small M3 copper bolts to large M30 copper hex bolts for heavy-duty industrial applications, all maintaining superior corrosion resistance, non-magnetic properties, excellent electrical and thermal conductivity for reliable long-term performance.
Our advanced manufacturing capabilities in producing precision copper hex bolts extend across multiple manufacturing processes including hot forging for large diameter copper bolts with superior grain structure, cold heading for high-volume small to medium size copper bolts with consistent quality, CNC machining for custom copper bolt configurations, thread rolling for creating strong accurate threads with improved fatigue resistance, thread cutting for specialty thread forms, hexagonal head forming through forging or machining operations, and surface treatments including polishing for aesthetic applications. Our engineering team possesses deep technical knowledge of copper material properties, fastener design standards, thread specifications, torque requirements, and application-specific loading conditions ensuring every copper bolt meets or exceeds customer specifications and international fastener standards. Our quality management system complies with ISO 9001:2015 standards, fastener quality standards including ISO 898 for mechanical properties, DIN standards for dimensional specifications, ASTM copper material standards, and customer-specific copper bolt requirements. We maintain complete traceability of copper raw material certificates, detailed manufacturing process documentation, mechanical test records including tensile and proof load testing, and material test reports for every batch of copper bolts produced. Our customers across North America, European Union countries, United Kingdom, Australia, Middle East regions, and Southeast Asian markets trust our copper bolt expertise for their critical fastening and electrical connection applications.
Copper Bolts – Non-Magnetic Corrosion-Resistant Fasteners
Copper Bolts represent specialized threaded fasteners manufactured from copper or copper alloys designed to provide corrosion-resistant connections in environments where ferrous fasteners would deteriorate, non-magnetic properties are essential, electrical conductivity is required, or aesthetic appearance of copper finish is desired. These copper bolts are manufactured from high-purity copper grades providing excellent resistance to atmospheric corrosion, saltwater corrosion, chemical exposure, and galvanic corrosion when connecting dissimilar metals. Copper bolts find extensive applications in marine hardware and shipbuilding where saltwater corrosion resistance is critical, electrical bus bar connections requiring high electrical conductivity with secure mechanical fastening, chemical processing equipment where corrosion resistance to acids and alkaline solutions is necessary, architectural copper roofing and cladding systems requiring matching copper fasteners, grounding and earthing systems in electrical installations, telecommunications equipment mounting requiring non-magnetic properties, lightning protection systems, renewable energy installations including solar panel mounting and wind turbine connections, museum and historical restoration projects requiring period-appropriate fasteners, and industrial applications where spark-free non-magnetic fasteners are safety requirements.
Our copper bolt manufacturing services include engineering consultation for fastener selection based on application requirements, material recommendation considering strength, conductivity, and corrosion resistance needs, custom bolt design including non-standard lengths, diameters, or thread specifications, prototype development for validation testing, high-volume production with consistent quality and dimensional accuracy, various head styles including hexagonal, square, round, countersunk, and custom configurations, threading options including full thread, partial thread, or custom thread lengths, surface finishing including polishing, passivation, or coating as specified, mechanical testing validating tensile strength and proof load per applicable standards, and complete documentation with material certificates and test reports. We accommodate copper bolt sizes ranging from M3 x 10mm for small electronic applications to M30 x 300mm for heavy industrial installations, with thread specifications conforming to metric ISO threads, unified inch threads, or custom thread forms. Material specifications conform to ASTM B124 for copper bars rods and shapes, ASTM B187 for copper bus bar wire and rod, ASTM B152 for copper sheet strip plate and rolled bar, and corresponding international standards including EN designations for European copper grades, JIS H3250 for Japanese copper specifications, and IS 191 for Indian copper standards. Copper bolts typically provide tensile strength ranging from 220 MPa for pure copper grades to over 400 MPa for copper alloys, with elongation properties enabling moderate bolt preload without thread stripping. The lead time for copper bolt production typically ranges from four to six weeks depending on bolt size, quantity, thread specifications, head style requirements, and surface treatment specifications.
Copper Hex Bolts – Hexagonal Head Copper Fasteners
Copper Hex Bolts represent the most common configuration of copper bolts featuring hexagonal head design enabling tightening using standard wrenches, spanners, or socket tools, providing secure grip for installation and removal operations. These precision copper hex bolts are manufactured with hexagonal heads conforming to international dimensional standards including DIN 931 for hex bolts with partial thread, DIN 933 for hex bolts with full thread, ISO 4014 for hex head bolts, ISO 4017 for hex head screws, ANSI B18.2.1 for American standard hex bolts, and custom head dimensions per customer specifications. Copper hex bolts provide advantages in applications requiring standard tooling accessibility, high torque transfer capability through hexagonal head geometry, consistent appearance for architectural applications, compatibility with standard nuts and washers, and ease of field installation without specialized tools. Common copper hex bolt configurations include standard hex head with chamfered edges, heavy hex head for higher torque applications, finished hex head with tight tolerances for precision assembly, semi-finished hex head for general applications, and flanged hex head combining bolt head with integrated washer surface.
The manufacturing process for precision copper hex bolts begins with copper bar stock selection in appropriate diameter to accommodate bolt shank and head dimensions, followed by cutting billets to length for forging operations, hot forging of hexagonal head shape using closed-die forging ensuring accurate head dimensions and strong grain flow from head through shank, upset forging for enhanced head strength in critical applications, shank machining to final diameter with close tolerances, thread rolling using cylindrical dies creating precise thread form with work-hardened surface and improved fatigue properties compared to cut threads, thread cutting on CNC machines for custom thread specifications or sizes beyond rolling capacity, head machining operations ensuring flatness, perpendicularity, and dimensional accuracy, deburring removing sharp edges from threads and head transitions, surface finishing including polishing, tumbling, or brushing as specified, quality inspection verifying all dimensional characteristics, mechanical testing validating tensile strength and proof load conformance, and packaging with protective measures preventing damage and oxidation. Our copper hex bolt capabilities include bolt diameters from M3 to M30, thread lengths from 10mm to 300mm or custom as specified, thread pitches conforming to coarse, fine, or extra-fine specifications, head sizes per DIN or ISO standards with across-flats dimensions and head height meeting specifications, and tolerances maintaining 6g thread class or tighter for precision assemblies. Copper hex bolts can be supplied with various thread configurations including partial thread with plain shank under head for applications requiring unthreaded grip length, full thread extending to head for maximum adjustability, or custom thread length meeting specific assembly stack-up requirements.
Copper Material Grades and Specifications
Copper Material Specifications and Standards for Bolts
| Copper Grade | International Designation | Key Properties | Typical Applications | Standards |
|---|---|---|---|---|
| Copper C11000 | CW004A (EN), C1100 (JIS), T2 (GB) | 99.9% pure copper, excellent conductivity, good corrosion resistance | Electrical bus bar bolts, grounding bolts, general copper fasteners | ASTM B124, BS EN 1652, DIN EN 13601, JIS H3250, IS 191 |
| Copper C10200 | CW008A (EN), C1020 (JIS), TU2 (GB) | Oxygen-free copper, highest conductivity, premium applications | High-performance electrical connections, critical applications | ASTM B170, BS EN 1652, DIN EN 13599, JIS H3250 |
| Silicon Bronze C65500 | CW115C (EN), CAC406 (JIS) | High strength, excellent marine corrosion resistance | Marine hardware, boat building, saltwater applications | ASTM B98, BS EN 12163, JIS H3250 |
| Aluminum Bronze C95400 | CW307G (EN), CAC703 (JIS) | Very high strength, wear resistant, marine grade | Heavy-duty marine, pump bolts, high-load applications | ASTM B148, BS EN 1982, JIS H5120 |
| Beryllium Copper C17200 | CW101C (EN), C1720 (JIS) | Highest strength copper alloy, heat treatable, non-magnetic | High-strength bolts, aerospace, specialized industrial | ASTM B194, BS EN 12166, JIS H3270 |
Copper Bolt Material Properties Comparison
| Property | C11000 Copper | C10200 Copper | Silicon Bronze | Aluminum Bronze | Beryllium Copper |
|---|---|---|---|---|---|
| Tensile Strength (MPa) | 220-260 | 210-240 | 380-520 | 620-750 | 1170-1310 |
| Yield Strength (MPa) | 70-195 | 60-185 | 145-415 | 240-380 | 1000-1200 |
| Elongation (%) | 45-55 | 45-55 | 20-40 | 12-25 | 4-8 |
| Electrical Conductivity (% IACS) | 100% | 101% | 7% | 12% | 22% |
| Corrosion Resistance | Excellent | Excellent | Excellent | Excellent | Good |
| Machinability Rating | Good | Good | Excellent | Fair | Good |
| Non-Magnetic | Yes | Yes | Yes | Yes | Yes |
| Cost Factor | Standard | High | Medium | Medium | Very High |
Manufacturing Processes and Technology
Our precision copper bolt manufacturing facility employs multiple manufacturing processes including hot forging using hydraulic presses up to 300 tons capacity for large diameter copper bolts and hexagonal head forming with controlled grain flow, cold heading machines for high-volume production of small to medium copper bolts with excellent dimensional consistency, CNC turning and milling for custom bolt configurations and non-standard head styles, thread rolling machines creating precise metric and inch threads with work-hardened surface improving fatigue resistance, thread cutting on CNC lathes for specialty threads or sizes beyond rolling capacity, hexagon forming through multi-stage forging or machining operations, heat treatment facilities for copper alloys requiring solution treatment and aging, surface finishing equipment including tumbling, polishing, and brushing, and quality testing equipment including thread gauges, tensile testing machines, and dimensional inspection tools.
Manufacturing Process Flow: Copper raw material procurement and inspection → Cutting billets to length → Hot forging or cold heading of bolt head → Shank forming to diameter → Thread rolling or cutting → Head machining if required → Heat treatment for alloys requiring → Deburring and edge finishing → Surface finishing operations → Quality inspection and testing → Packaging and labeling → Final shipment.
Copper Bolt Dimensions and Thread Specifications
Standard Copper Hex Bolt Dimensions
| Bolt Size | Thread Pitch (mm) | Across Flats (mm) | Head Height (mm) | Shank Diameter (mm) | Standard Lengths Available |
|---|---|---|---|---|---|
| M3 | 0.5 | 5.5 | 2.0 | 3.0 | 10-50mm |
| M4 | 0.7 | 7.0 | 2.8 | 4.0 | 10-60mm |
| M5 | 0.8 | 8.0 | 3.5 | 5.0 | 12-80mm |
| M6 | 1.0 | 10.0 | 4.0 | 6.0 | 16-100mm |
| M8 | 1.25 | 13.0 | 5.3 | 8.0 | 20-150mm |
| M10 | 1.5 | 17.0 | 6.4 | 10.0 | 25-200mm |
| M12 | 1.75 | 19.0 | 7.5 | 12.0 | 30-250mm |
| M16 | 2.0 | 24.0 | 10.0 | 16.0 | 40-300mm |
| M20 | 2.5 | 30.0 | 12.5 | 20.0 | 50-300mm |
| M24 | 3.0 | 36.0 | 15.0 | 24.0 | 60-300mm |
Copper Bolt Mechanical Properties
| Material Grade | Tensile Strength Min (MPa) | Proof Load (MPa) | Hardness (HB) | Typical Applications |
|---|---|---|---|---|
| Pure Copper C11000 | 220 | 70 | 45-65 | Electrical, grounding, low-stress |
| Silicon Bronze C65500 | 380 | 145 | 70-90 | Marine, moderate strength |
| Aluminum Bronze C95400 | 620 | 240 | 150-180 | Heavy-duty marine, high-load |
| Beryllium Copper C17200 | 1170 | 1000 | 320-380 | High-strength specialized |
Quality Control and Testing
Dimensional Inspection: Every batch of copper bolts undergoes comprehensive dimensional inspection including thread gauges verifying thread pitch diameter, major diameter, and minor diameter conformance to 6g tolerance class or as specified, across-flats measurement of hexagonal head ensuring conformance to DIN or ISO standards typically ±0.2mm tolerance, head height verification confirming dimensional accuracy, overall length measurement, and shank diameter verification using precision micrometers. Thread quality is validated using go-no-go thread gauges confirming proper thread form and pitch accuracy.
Mechanical Testing: Tensile testing on representative samples validates tensile strength meets minimum requirements for specified copper grade per ASTM specifications. Proof load testing verifies bolts withstand specified proof load without permanent deformation or thread stripping. Hardness testing confirms material hardness falls within acceptable range for specified copper alloy grade. Testing frequency follows statistical sampling plans per ISO 2859 or customer-specific requirements.
Material Verification: Chemical composition analysis using optical emission spectroscopy confirms copper grade matches material certification. Material certificates from copper supplier document chemical analysis and mechanical properties of source material. Complete traceability maintained from copper raw material through finished bolt production linking heat numbers to production batches.
Documentation: Complete documentation package includes material certificates from copper supplier with chemical analysis, manufacturing process records, dimensional inspection reports, mechanical test results including tensile and proof load data, and certificate of conformance stating compliance with purchase order specifications and applicable standards.
Industries and Applications
Electrical Industry: Copper bolts for bus bar connections in electrical panels, substation bus bar bolts, switchgear copper fasteners, transformer terminal connections, electrical grounding and earthing bolts, lightning protection system bolts, and power distribution copper hardware. High electrical conductivity of copper enables current flow through fastener while providing mechanical connection.
Marine Industry: Silicon Bronze hex bolts for boat building and marine hardware, copper fasteners for ship deck fittings, marine pump mounting bolts, propeller shaft bolts, rudder hardware, saltwater-resistant copper fasteners, yacht hardware, and offshore platform copper bolts. Excellent corrosion resistance in saltwater environments ensures long service life.
Chemical Processing: Copper alloy bolts for chemical equipment assembly, acid and alkali resistant copper fasteners, chemical storage tank bolts, process piping flange bolts, pump and valve mounting hardware, and corrosion-resistant copper fasteners for aggressive chemical environments where stainless steel may not provide adequate resistance.
Architectural Applications: Copper hex bolts for copper roofing systems, architectural copper cladding fasteners, copper downspout brackets, gutter mounting bolts, decorative copper hardware, historical building restoration fasteners, and ornamental copper installations. Aesthetic copper appearance and patina development over time desired.
Telecommunications: Non-magnetic copper bolts for telecommunications equipment mounting, antenna mounting hardware, tower climbing safety hardware, RF shielding applications requiring non-ferrous fasteners, and grounding system connections. Non-magnetic properties prevent interference with sensitive electronic equipment.
Railway Applications: Copper bonding bolts for electrical continuity between rails, grounding connections in railway signaling, non-magnetic fasteners for track equipment, and railway electrical distribution copper hardware.
Renewable Energy: Solar panel mounting copper bolts, photovoltaic grounding connections, wind turbine electrical connections, solar inverter mounting hardware, and renewable energy grounding systems.
Performance Specifications
Copper Bolt Performance Parameters
| Parameter | Pure Copper | Silicon Bronze | Aluminum Bronze | Beryllium Copper |
|---|---|---|---|---|
| Tensile Strength | 220-260 MPa | 380-520 MPa | 620-750 MPa | 1170-1310 MPa |
| Yield Strength | 70-195 MPa | 145-415 MPa | 240-380 MPa | 1000-1200 MPa |
| Electrical Conductivity | 100% IACS | 7% IACS | 12% IACS | 22% IACS |
| Operating Temperature | -200°C to +250°C | -200°C to +400°C | -200°C to +400°C | -200°C to +300°C |
| Corrosion Resistance | Excellent | Excellent | Excellent | Good |
| Magnetic Properties | Non-magnetic | Non-magnetic | Non-magnetic | Non-magnetic |
| Thread Class | 6g typical | 6g typical | 6g typical | 6g typical |
Frequently Asked Questions
Q1: What are the advantages of copper bolts over steel bolts?
Copper bolts provide superior corrosion resistance in marine and chemical environments, non-magnetic properties essential for electronic equipment and specialized applications, excellent electrical and thermal conductivity for electrical connections, spark-free properties for hazardous environments, aesthetic copper appearance for architectural applications, and resistance to galvanic corrosion when fastening copper components.
Q2: Can copper hex bolts be used for structural applications?
Pure copper bolts with tensile strength 220-260 MPa are suitable for low to moderate stress applications. For structural applications requiring higher strength, we recommend Silicon Bronze bolts offering 380-520 MPa tensile strength, Aluminum Bronze bolts providing 620-750 MPa strength comparable to Grade 5 steel, or Beryllium Copper bolts achieving 1170-1310 MPa for high-strength requirements.
Q3: What is the typical lead time for custom copper bolt orders?
Standard lead time for copper bolt orders is four to six weeks from purchase order confirmation to shipment, accounting for copper material procurement, forging or heading operations, thread rolling or cutting, quality inspection, and packaging. For existing standard sizes with materials in stock, expedited delivery within 2-3 weeks may be possible. Custom sizes, special threads, or large quantities may require extended lead times.
Q4: Do copper bolts require special installation procedures?
Copper bolts should be installed using appropriate torque values based on material grade and bolt size, typically 30-50% lower than equivalent steel fasteners due to lower yield strength. Use lubricants compatible with copper to prevent galling. Avoid over-tightening which can cause thread stripping or permanent deformation. For electrical connections, ensure clean contact surfaces and proper torque for low contact resistance.
Q5: What documentation is provided with copper bolt shipments?
We provide comprehensive documentation including material certificates from copper supplier with chemical analysis, mechanical test reports showing tensile strength and proof load results, dimensional inspection reports, certificate of conformance stating compliance with specifications, and traceability documentation linking production batches to material heat numbers.
Why Choose Our Copper Bolt Services
Three Decades of Fastener Manufacturing Excellence: With over 30 years of copper bolt and fastener manufacturing experience serving electrical, marine, chemical processing, and architectural industries across global markets, we have developed deep expertise in copper fastener design, forging processes, thread manufacturing, and quality assurance.
Comprehensive Manufacturing Capabilities: Our integrated manufacturing facility houses forging equipment, cold heading machines, CNC machining centers, thread rolling equipment, and complete quality testing facilities enabling vertical integration from copper raw material to finished copper bolts, reducing lead times and ensuring quality control.
Wide Range of Copper Grades: We manufacture copper bolts from pure copper C11000 for electrical applications, oxygen-free copper C10200 for high-performance requirements, Silicon Bronze for marine environments, Aluminum Bronze for high-strength applications, and Beryllium Copper for specialized high-strength requirements.
Quality Assurance and Testing: Every batch of copper bolts undergoes dimensional inspection using thread gauges and precision measuring equipment, mechanical testing including tensile and proof load validation, material verification, and complete documentation providing traceability and conformance certification.
Engineering Support Services: Our experienced engineering team provides fastener selection guidance based on application requirements, material recommendation considering strength and corrosion resistance, custom bolt design including non-standard dimensions, thread specifications, or head styles, and technical consultation for installation procedures and torque requirements.
Competitive Manufacturing Advantage: Manufacturing in India provides significant cost advantages allowing us to offer copper bolt products typically 30-40% lower cost than North American or European manufacturers without compromising quality standards, material specifications, or performance characteristics.
International Standards Compliance: Our copper bolts conform to international standards including DIN, ISO, ASTM, and ANSI specifications for dimensions and mechanical properties, ensuring compatibility with standard nuts, washers, and tooling, and meeting global fastener requirements.
Flexibility in Order Quantities: We accommodate both small orders for specialized projects and high-volume production runs for established applications, offering flexible minimum order quantities, scalable production capacity, and consistent quality across all order sizes.
Glossary of Technical Terms
Hex Bolt: Threaded fastener with hexagonal head designed for tightening using wrench or socket tool.
Thread Rolling: Manufacturing process creating threads by displacing material using cylindrical dies, producing stronger threads than cutting.
Tensile Strength: Maximum stress material can withstand while being stretched before breaking, measured in MPa or PSI.
Proof Load: Maximum load fastener must withstand without permanent deformation, typically 90% of yield strength.
IACS (International Annealed Copper Standard): Standard reference for electrical conductivity where pure annealed copper equals 100% IACS.
Silicon Bronze: Copper alloy containing silicon offering high strength and excellent marine corrosion resistance.
Aluminum Bronze: Copper alloy containing aluminum providing very high strength and wear resistance.
Beryllium Copper: Copper alloy containing beryllium offering highest strength among copper alloys through heat treatment.
Thread Class: Designation indicating thread tolerance fit, with 6g common for copper bolts indicating medium fit.
Across Flats: Distance measured across opposite flat surfaces of hexagonal bolt head.
Partial Thread: Bolt configuration with plain shank under head and threaded portion at opposite end.
Full Thread: Bolt with threads extending from tip to head.
Call to Action – Contact Us Today
Ready to discuss your copper bolt and copper hex bolt requirements? Our experienced team is here to help you with precision copper fasteners for your critical applications.
Request a Quote: Send us your technical specifications, drawings, and quantity requirements to sales@jambrass.com for a detailed quotation within 24 hours.
Call Us Directly: Speak with our technical sales team at +91-22-43449300 / +91-22-43449323 during business hours (Monday-Saturday, 9:00 AM – 6:00 PM IST) to discuss your copper bolt requirements.
Visit Our Offices:
Office Address: 1406, 14th Floor, Dalamal Tower, Nariman Point, Mumbai – 400021, Maharashtra, India
Factory Address: Plot 10B, GIDC Industrial Estate, Shanker Tekari, Udyognagar, Jamnagar, Gujarat, India – 361004
Contact Person: Mr. Mehul Vora
Quality Documentation: Request sample certificates of conformance, material test reports, mechanical test results, and inspection documentation by contacting sales@jambrass.com
