Copper Socket Head Screws & Copper Grub Screws – Manufacturer, Supplier & Exporter | Conex India
Conex Screws and Fasteners is a premier manufacturer and exporter of Copper Socket Head Screws and Copper Grub Screws (also known as Copper Socket Set Screws or Copper Headless Screws) from Jamnagar, India. With over three decades of fastener manufacturing experience, we supply precision copper screws to customers across the USA, UK, Europe, Australia, Canada, Germany, and the Middle East. Our copper screws are widely recognised for their excellent electrical conductivity, corrosion resistance, and antimicrobial properties.
What Are Copper Socket Head Screws?
Copper Socket Head Screws are internally-driven fasteners featuring a cylindrical head with a hexagonal (Allen key) socket. Manufactured from high-purity copper alloys, these screws offer exceptional electrical conductivity (up to 100% IACS), outstanding corrosion resistance in marine and chemical environments, and natural antimicrobial properties. They are ideal for electrical panels, busbars, grounding systems, marine fittings, and plumbing applications where both conductivity and corrosion resistance are critical.
What Are Copper Grub Screws (Socket Set Screws)?
Copper Grub Screws are fully threaded, headless fasteners driven by a hex (Allen) key. Also called Copper Set Screws, they are used for securing collars, pulleys, and shafts in position without protruding above the surface. The non-magnetic and spark-free nature of copper makes these screws essential in explosive or sensitive electronic environments.
Material Grades & International Equivalents
| Standard | Grade | Composition | Region |
|---|---|---|---|
| UNS | C11000 | 99.9% Cu (ETP Copper) | USA |
| UNS | C10100 | 99.99% Cu (OFE Copper) | USA |
| EN | CW004A | Cu-ETP | Europe |
| EN | CW008A | Cu-OF | Europe |
| DIN | 2.0060 | E-Cu 57 | Germany |
| BS | C101 | High-conductivity copper | UK |
| IS | 191 | Electrolytic copper | India |
| JIS | C1100 | Tough pitch copper | Japan |
Size & Dimensional Chart – Metric (ISO 4762 / DIN 912)
| Size | Pitch (mm) | Head Dia (mm) | Head Height (mm) | Key Size (mm) | Length Range (mm) |
|---|---|---|---|---|---|
| M3 | 0.5 | 5.5 | 3.0 | 2.5 | 5–30 |
| M4 | 0.7 | 7.0 | 4.0 | 3.0 | 6–40 |
| M5 | 0.8 | 8.5 | 5.0 | 4.0 | 8–50 |
| M6 | 1.0 | 10.0 | 6.0 | 5.0 | 10–60 |
| M8 | 1.25 | 13.0 | 8.0 | 6.0 | 12–80 |
| M10 | 1.5 | 16.0 | 10.0 | 8.0 | 16–100 |
| M12 | 1.75 | 18.0 | 12.0 | 10.0 | 20–120 |
Size & Dimensional Chart – Grub Screws Metric (DIN 916 / ISO 4029)
| Size | Pitch (mm) | Key Size (mm) | Cup Point Dia (mm) | Length Range (mm) |
|---|---|---|---|---|
| M3 | 0.5 | 1.5 | 1.4 | 3–16 |
| M4 | 0.7 | 2.0 | 2.0 | 4–20 |
| M5 | 0.8 | 2.5 | 2.5 | 5–25 |
| M6 | 1.0 | 3.0 | 3.0 | 6–30 |
| M8 | 1.25 | 4.0 | 4.0 | 8–40 |
| M10 | 1.5 | 5.0 | 5.0 | 10–50 |
| M12 | 1.75 | 6.0 | 6.0 | 12–60 |
Key Features & Performance Metrics
- Electrical Conductivity: Up to 100% IACS – ideal for busbars and grounding applications
- Corrosion Resistance: Excellent in marine, saline, and humid environments
- Antimicrobial Properties: Natural copper surface inhibits bacterial and fungal growth
- Non-Magnetic: Safe for use near sensitive electronic and magnetic equipment
- Non-Sparking: Safe for use in explosive or flammable environments
- Thermal Conductivity: 385 W/m·K – excellent heat dissipation
- Tensile Strength: 200–250 MPa (varies by alloy and temper)
- Temperature Range: -200°C to +180°C operating range
Applications
Copper Socket Head Screws and Copper Grub Screws are used across a wide range of industries including electrical switchgear and panel boards, busbar and grounding systems, marine and offshore equipment, plumbing and HVAC systems, chemical processing plants, medical and laboratory instruments, renewable energy (solar and wind), and telecommunications infrastructure.
Why Choose Conex Over Other Manufacturers?
- 30+ Years of Experience: Three decades of precision fastener manufacturing from Jamnagar, India
- Faster Turnaround: Standard orders dispatched within 7–14 working days; urgent orders accommodated
- Superior Customer Support: Dedicated account managers for each client, available across time zones
- Excellent Communication: Fluent English-speaking team with prompt responses to RFQs and technical queries
- Global Exposure: Regular exporters to USA, UK, Germany, Australia, Canada, UAE, and 50+ countries
- Competitive Pricing: Direct manufacturer pricing with no middlemen
- Quality Assurance: ISO-certified processes, material test certificates (MTC) provided on request
- Custom Orders Welcome: Non-standard sizes, special alloys, custom finishes available
Our Flexibility to Customise
At Conex, we understand that every application has unique requirements. We offer copper screws in custom thread forms (UNC, UNF, BSW, BSF, Metric Fine), special head styles, non-standard lengths, custom packaging, and special surface treatments including nickel plating, tin plating, and silver plating. MOQs are flexible for both sample and bulk orders.
What Separates Conex from Other Manufacturers
Unlike trading companies, Conex is a direct manufacturer with full in-house capability from cold forging through to thread rolling and finishing. Our dedicated quality control team performs dimensional checks, hardness testing, and surface inspection on every batch. We provide mill test certificates, RoHS compliance declarations, and country-of-origin certificates as standard. Our export packaging meets ISPM-15 requirements and we have extensive experience with LC, TT, and documentary collection payment terms for global buyers.
Export-Worthy Packaging
- Inner: Polybags or blister packs sorted by size and type
- Outer: Double-wall corrugated export cartons
- Labelling: Part number, material, size, quantity, batch number, and country of origin on every carton
- Special packaging: Moisture-absorbing desiccant packs available for humid climate shipments
- Pallet: ISPM-15 heat-treated wooden pallets for full container loads
Technical Q&A – Copper Socket Head Screws & Copper Grub Screws
Q1. What is the difference between copper socket head screws and copper grub screws?
A: Copper socket head screws have a cylindrical protruding head with an internal hex drive and are used where a visible head is acceptable. Copper grub screws (set screws) are fully threaded and headless, used to lock components onto shafts or inside bores without any protrusion above the mating surface.
Q2. What copper grade is best for electrical applications?
A: C11000 (ETP – Electrolytic Tough Pitch Copper) with 99.9% purity and 100% IACS conductivity is the preferred grade for busbars, grounding bolts, and electrical panel fasteners. For even higher purity, C10100 (OFE – Oxygen-Free Electronic) copper is used in sensitive electronics.
Q3. Are copper grub screws non-magnetic?
A: Yes. Pure copper and copper alloys are inherently non-magnetic, making copper grub screws and socket head screws ideal for MRI equipment rooms, electronic testing labs, and environments where magnetic interference must be eliminated.
Q4. What standards do your copper socket head screws conform to?
A: Our copper socket head cap screws conform to ISO 4762, DIN 912, and ASME B18.3. Copper grub screws conform to ISO 4026, ISO 4027, ISO 4028, ISO 4029, and DIN 913–916 depending on point style.
Q5. Can copper screws be used in marine environments?
A: Yes. Copper offers excellent resistance to seawater corrosion, making copper socket head screws and grub screws ideal for marine deck fittings, hull hardware, underwater sensors, and boat electrical systems.
Q6. What is the tensile strength of copper socket head screws?
A: Standard ETP copper (C11000) screws have tensile strength of approximately 220–250 MPa. For higher strength requirements, copper-beryllium or copper-chrome-zirconium alloys can be used, offering tensile strengths up to 1200 MPa.
Q7. Do you supply copper grub screws with different point styles?
A: Yes. We supply copper set screws with cup point (DIN 916), flat point (DIN 913), dog point (DIN 915), cone point (DIN 914), and knurled cup point (DIN 916 variant) to suit various locking and positioning applications.
Q8. What is the minimum order quantity for copper socket head screws?
A: We accommodate orders from as low as 100 pieces for samples up to full container loads. Contact us with your exact requirements for a tailored quotation.
Q9. Are your copper screws RoHS compliant?
A: Yes. Our copper fasteners are manufactured using RoHS-compliant materials with no restricted substances. Compliance declarations are provided on request.
Q10. Can you supply copper socket head screws in UNC or UNF thread forms?
A: Yes. We supply copper socket head cap screws and grub screws in Metric (ISO), UNC (Unified Coarse), UNF (Unified Fine), BSW, and BSF thread forms to meet American, British, and international standards.
Q11. What surface finishes are available for copper fasteners?
A: We offer natural (as-machined) copper finish, bright nickel plating, tin plating, silver plating, and passivation. Surface finish selection depends on the application environment and conductivity requirements.
Q12. How do copper screws compare to stainless steel in corrosion resistance?
A: In seawater and chloride-rich environments, copper often outperforms standard 304 stainless steel. In strong oxidising acid environments, stainless steel performs better. For electrical applications, copper is superior due to its conductivity.
Q13. What is the lead time for copper socket head screws from Conex?
A: Standard sizes are typically available from stock or can be produced within 7–14 working days. Custom sizes or special alloys may require 3–4 weeks. Urgent requirements can often be accommodated – please contact our sales team.
Q14. Do you provide material test certificates for copper screws?
A: Yes. We provide material test certificates (MTC) with chemical composition and mechanical property data for all export orders. EN 10204 3.1 certificates are available on request.
Q15. Can Conex supply copper socket head screws to ASTM B187 standard?
A: Yes. We can supply copper fasteners conforming to ASTM B187 (copper bus bar, rod, and shapes) and ASTM B152 (copper sheet, strip, and plate) material specifications upon customer request.
Customer Testimonials
James Whitfield, Procurement Manager – Houston, Texas, USA
“We have been sourcing copper grub screws and socket head screws from Conex for three years now. Their quality is consistently excellent, delivery is on time, and their team responds promptly to every query. Highly recommended for anyone needing reliable copper fastener supply.”
Graham Fletcher, Technical Director – Birmingham, UK
“Conex supplied our project with a large batch of copper socket cap screws to DIN 912 specification with full MTC documentation. The dimensional accuracy was spot on and packaging was excellent for our sea freight shipment. We will continue using Conex as our preferred copper fastener supplier.”
Glossary of Related Terms
Socket Head Cap Screw: A fastener with a cylindrical head and internal hexagonal drive socket | Grub Screw: A headless, fully threaded screw driven by an Allen key, also called a set screw | ETP Copper: Electrolytic Tough Pitch copper with 99.9% purity, the most common electrical-grade copper | IACS: International Annealed Copper Standard – the benchmark for electrical conductivity | DIN 912: German standard for socket head cap screws | ISO 4762: International standard equivalent to DIN 912 | Allen Key: Hexagonal wrench used to drive socket head and grub screws | Cup Point: The most common grub screw tip, featuring a small cup-shaped indentation for positive locking | Non-Sparking: A property of copper alloys preventing ignition sparks in explosive environments | MTC: Material Test Certificate – documentation confirming material chemical and mechanical properties
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Ready to source premium quality Copper Socket Head Screws and Copper Grub Screws from a trusted Indian manufacturer with 30+ years of export experience? Contact Conex today for competitive pricing, fast delivery, and full technical support.
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