Premium Bronze Stud Connectors & Bronze Substation Connectors — Supplied to the USA
Conex Screws and Fasteners is a leading manufacturer and exporter of bronze stud connectors and bronze substation connectors, with the United States as our primary export market. We ship directly to electrical contractors, substation builders, utilities, OEMs, and industrial distributors across all 50 US states. Each connector is individually cast, machined, and threaded to exacting tolerances, ensuring robust mechanical strength, superior electrical conductivity, and long-term corrosion resistance in harsh environments.
Our bronze connectors are precision-engineered for demanding electrical substation, switchgear, busbar, and power distribution applications. Widely specified for power generation plants, electrical substations, railway traction equipment, marine switchboards, motor control centers, and offshore installations — the inherent properties of bronze (excellent conductivity, natural corrosion resistance, and mechanical durability) make these connectors the preferred choice for critical electrical infrastructure throughout the United States and worldwide.
Why US Buyers Choose Conex Bronze Connectors
- USA Primary Export Market: We manufacture specifically to ASTM/UNS material specifications and supply US-standard thread forms (UNC, UNF) as standard, alongside Metric, BSW, and BSF
- ASTM-Referenced Material Grades: All alloys referenced to UNS/ASTM designations — the standard system used by US engineers and procurement teams
- Direct Factory Pricing: Bypass distributor markups — order direct from our manufacturing facility with competitive FOB and CIF pricing to US ports
- Fast US Shipping: Air freight and sea freight options to all major US ports — New York, Los Angeles, Houston, Chicago, and more
- Mill Test Reports (MTRs): Full material test certificates provided as standard — meeting US procurement and quality requirements
- DFARS / Buy America Compliance: Contact us to discuss project-specific compliance requirements
Product Features
- Manufacturing Process: Cast, CNC-machined, and threaded to precise dimensional tolerances
- Thread Forms Available: UNC, UNF, Metric (ISO), BSW, BSF, and custom thread forms on request
- Connection Types: Stud-to-stud, stud-to-bar, T-connectors, straight connectors, cross-connectors, tee-off connectors
- Finish Options: As-cast machined, tin-plated, nickel-plated, or silver-plated for enhanced conductivity and oxidation protection
- Sizes: Available in a comprehensive range from 1/4″ to 2-1/2″ (and metric equivalents M6 to M64), with custom sizes manufactured to drawing
- Standards Compliance: Manufactured to ASTM, IEC, BS EN, and customer-specific standards
- Custom Configurations: Special lengths, flats, hole patterns, and connector geometries available to specification
Bronze Material Grades & International Equivalents
We supply bronze stud and substation connectors in all principal international bronze grades to meet project-specific conductivity, strength, and corrosion resistance requirements. The table below lists the most commonly specified grades along with their international equivalents:
| UNS / ASTM (USA) | Common Name | BS (UK) | EN / ISO (Europe) | DIN (Germany) | JIS (Japan) | IS (India) | Key Properties |
|---|---|---|---|---|---|---|---|
| C10200 / C11000 | Electrolytic Tough Pitch Copper | BS EN 13601 CW004A | CW004A / CU-ETP | E-Cu58 (DIN 1787) | JIS H3100 C1100 | IS 191 Grade ETP | Max conductivity (100% IACS); busbar & conductor applications |
| C63000 | Nickel-Aluminum Bronze | BS 2874 CA104 | EN 12163 CW307G / CuAl10Ni5Fe4 | DIN 17672 CuAl10Ni | JIS H3270 C6301 | IS 7811 | High strength, excellent corrosion resistance, marine & heavy duty |
| C63200 | Nickel-Aluminum Bronze | BS 2874 CA107 | EN 12163 CW308G / CuAl9Ni5Fe3Mn2 | DIN 17672 CuAl9Ni | JIS H3270 C6301 | IS 7811 | Superior seawater & chemical corrosion resistance |
| C65100 | Low-Silicon Bronze (Grade B) | BS 2874 CS101 | EN 12163 CW115C / CuSi1 | DIN 17672 CuSi1 | JIS H3270 C6510 | IS 320 | Good corrosion resistance, good machinability |
| C65500 | High-Silicon Bronze (Grade A) | BS 2874 CS101 | EN 12163 CW116C / CuSi3Mn1 | DIN 17672 CuSi3Mn1 | JIS H3270 C6560 | IS 320 | Highest corrosion resistance of silicon bronzes; strong |
| C86300 | Manganese Bronze (High Tensile Brass) | BS 1400 HTB3 | EN 1982 CC765S / CuZn25Al5Mn4Fe3 | DIN 1705 CuZn25Al5Mn | JIS H5111 BC6 | IS 318 Grade 3 | High tensile strength, wear resistance; heavy industrial fittings |
| C90300 | Tin Bronze (88-8-0-4) | BS 1400 LG2 | EN 1982 CC491K / CuSn8Zn4 | DIN 1705 G-CuSn8Zn | JIS H5111 BC3 | IS 318 Grade LTB2 | Good electrical properties, general purpose substation use |
| C90500 | Gun Metal (88-10-0-2) | BS 1400 G1 | EN 1982 CC480K / CuSn10Zn2 | DIN 1705 G-CuSn10Zn | JIS H5111 BC6 | IS 318 Grade GM | Excellent pressure tightness, corrosion resistance; switchgear |
| C93200 | Bearing Bronze (83-7-7-3) | BS 1400 LB2 | EN 1982 CC494K / CuSn7Zn4Pb7 | DIN 1705 G-CuSn7ZnPb | JIS H5111 BC2 | IS 318 Grade LTB1 | Free-machining; excellent dimensional accuracy for threaded parts |
| C93700 | High-Lead Tin Bronze (80-10-10) | BS 1400 LB4 | EN 1982 CC495K / CuSn10Pb10 | DIN 1705 G-CuSn10Pb | JIS H5111 BC4 | IS 318 | Superior machinability; used for precision-threaded connector bodies |
| C95400 | Aluminum Bronze (9%) | BS 1400 AB1 / CA104 | EN 1982 CC331G / CuAl10Fe3 | DIN 1714 G-CuAl10Fe | JIS H5111 AlBC1 | IS 318 Grade AB1 | High strength, moderate conductivity; substation & marine |
| C95500 | Nickel-Aluminum Bronze (9%) | BS 1400 AB2 / CA105 | EN 1982 CC333G / CuAl10Fe5Ni5 | DIN 1714 G-CuAl10FeNi | JIS H5111 AlBC2 | IS 318 Grade AB2 | Maximum strength & corrosion resistance; offshore & power stations |
| C95800 | Nickel-Aluminum Bronze (Cast) | BS 1400 AB3 | EN 1982 CC334G / CuAl9Fe4Ni4Mn | DIN 1714 G-CuAl9NiFeMn | JIS H5111 AlBC3 | IS 318 | Best marine corrosion resistance; critical substation hardware |
| C10100 / C10200 | Oxygen-Free Copper (OFC) | BS EN 13601 CW008A | CW008A / Cu-OF | OF-Cu (DIN 1787) | JIS H3100 C1020 | IS 191 Grade OFC | Ultra-high conductivity (~101% IACS); sensitive electrical contacts |
| C17200 | Beryllium Copper | BS 2873 CB101 | EN 12163 CW101C / CuBe2 | DIN 17672 CuBe2 | JIS H3270 C1720 | IS 7811 | Highest strength copper alloy; spring contacts & precision connectors |
| C51000 | Phosphor Bronze (5%) | BS 2874 PB101 | EN 12163 CW450K / CuSn5 | DIN 17672 CuSn6 | JIS H3270 C5100 | IS 7811 | Spring quality; excellent fatigue resistance; contact springs |
| C52100 | Phosphor Bronze (8%) | BS 2874 PB102 | EN 12163 CW451K / CuSn8 | DIN 17672 CuSn8 | JIS H3270 C5210 | IS 7811 | Higher strength phosphor bronze; heavy-duty electrical contacts |
* Custom alloy compositions, bespoke grades, and dual-certified material (e.g., ASTM + EN) available on request. Contact our technical team for material certification (MTR/MTC) requirements.
Typical Applications in the USA
- High-voltage and medium-voltage electrical substations — busbar connections, grounding conductors, and tap-off connectors
- Switchgear and switchboard assemblies — panel bus connections, circuit breaker terminations
- Power transformers — LV and HV winding termination studs
- Railway and traction electrification — overhead line equipment, return current connectors
- Marine and offshore electrical systems — seawater-resistant switchboard and distribution panel connectors
- Industrial power distribution — motor control centers (MCCs), cable lug connectors, grounding systems
- Renewable energy installations — solar inverter connections, wind turbine electrical assemblies
- Petrochemical & hazardous area installations — non-sparking, explosion-proof connection hardware
- Data centers & critical infrastructure — reliable busbar connections for continuous power distribution
Why Choose Conex Bronze Connectors?
- Precision Manufacturing: Every connector is CNC-machined to tight tolerances — ensuring consistent thread engagement, mating surface flatness, and dimensional repeatability across batches
- Multi-Standard Compliance: Manufactured to ASTM, IEC 60949, IEC 62271, and BS EN 61439 material standards
- Flexible Minimum Order Quantities: From prototype quantities to full production runs — we accommodate projects of every scale
- Material Traceability: Full Mill Test Reports (MTRs) and third-party inspection available on request
- Fast Turnaround: Stocked standard sizes available for immediate dispatch; custom connectors manufactured and delivered to your schedule
- Technical Support: Our engineering team will help you select the right grade, thread form, and surface treatment for your specific application
- Competitive US Pricing: Direct from manufacturer — no middleman markups. We offer FOB and CIF pricing to all major US ports
📞 Request a Quote or Technical Consultation
Buying bronze stud connectors or substation connectors for a US project? Our team is ready to assist with technical selection, ASTM material certification, and competitive pricing with direct shipping to the USA.
☎ Call us today or use the inquiry form below to describe your requirement — we respond within one business day.
Ordering Information
Please provide the following information when inquiring about bronze stud or substation connectors:
- Connector type (stud-to-bar, T-connector, straight, cross, etc.)
- Thread size and form (1/2″-13 UNC, 3/8″-16 UNC, M10 x 1.5, etc.)
- Material grade (UNS/ASTM designation, or common name)
- Surface finish (as-machined, tin-plated, nickel-plated, silver-plated)
- Quantity required and any inspection or certification requirements (MTR, third-party, etc.)
- Drawing or dimensional sketch (if custom / non-standard)
- Delivery port or address (for US freight quote)
⚡ Need a Custom Bronze Connector for Your US Project?
We manufacture to drawing — any size, any ASTM grade, any thread form.
ISO 9001 quality management. Full material traceability. Direct shipping to USA.








