Conex Screws and Fasteners

Bronze Stud Connectors, Bronze Substation Connectors

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Conex Screws and Fasteners is a primary supplier of Bronze Stud Connectors and Bronze Substation Connectors to the USA. We manufacture and export cast, machined, and threaded bronze connectors directly to electrical contractors, utilities, OEMs, and distributors across all 50 US states — with competitive FOB pricing and fast shipping to all major American ports.

Available in all major ASTM/UNS bronze and copper alloy grades — including Aluminum Bronze (C95400, C95500, C95800), Tin Bronze (C90300, C90500), Phosphor Bronze (C51000, C52100), Silicon Bronze (C65100, C65500), Nickel-Aluminum Bronze (C63000, C63200), and Beryllium Copper (C17200) — with full international equivalents (ASTM, BS EN, DIN, JIS, IS). Custom sizes, UNC/UNF and metric thread forms, and all surface finishes available. Full Mill Test Reports (MTRs) supplied as standard.

🇺🇸 Supplying the USA: Fast shipping • ASTM material grades • MTRs included • Direct factory pricing

Bronze Stud Connectors, Copper Stud Connectors, Substation Connectors

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 NameBS (UK)EN / ISO (Europe)DIN (Germany)JIS (Japan)IS (India)Key Properties
C10200 / C11000Electrolytic Tough Pitch CopperBS EN 13601 CW004ACW004A / CU-ETPE-Cu58 (DIN 1787)JIS H3100 C1100IS 191 Grade ETPMax conductivity (100% IACS); busbar & conductor applications
C63000Nickel-Aluminum BronzeBS 2874 CA104EN 12163 CW307G / CuAl10Ni5Fe4DIN 17672 CuAl10NiJIS H3270 C6301IS 7811High strength, excellent corrosion resistance, marine & heavy duty
C63200Nickel-Aluminum BronzeBS 2874 CA107EN 12163 CW308G / CuAl9Ni5Fe3Mn2DIN 17672 CuAl9NiJIS H3270 C6301IS 7811Superior seawater & chemical corrosion resistance
C65100Low-Silicon Bronze (Grade B)BS 2874 CS101EN 12163 CW115C / CuSi1DIN 17672 CuSi1JIS H3270 C6510IS 320Good corrosion resistance, good machinability
C65500High-Silicon Bronze (Grade A)BS 2874 CS101EN 12163 CW116C / CuSi3Mn1DIN 17672 CuSi3Mn1JIS H3270 C6560IS 320Highest corrosion resistance of silicon bronzes; strong
C86300Manganese Bronze (High Tensile Brass)BS 1400 HTB3EN 1982 CC765S / CuZn25Al5Mn4Fe3DIN 1705 CuZn25Al5MnJIS H5111 BC6IS 318 Grade 3High tensile strength, wear resistance; heavy industrial fittings
C90300Tin Bronze (88-8-0-4)BS 1400 LG2EN 1982 CC491K / CuSn8Zn4DIN 1705 G-CuSn8ZnJIS H5111 BC3IS 318 Grade LTB2Good electrical properties, general purpose substation use
C90500Gun Metal (88-10-0-2)BS 1400 G1EN 1982 CC480K / CuSn10Zn2DIN 1705 G-CuSn10ZnJIS H5111 BC6IS 318 Grade GMExcellent pressure tightness, corrosion resistance; switchgear
C93200Bearing Bronze (83-7-7-3)BS 1400 LB2EN 1982 CC494K / CuSn7Zn4Pb7DIN 1705 G-CuSn7ZnPbJIS H5111 BC2IS 318 Grade LTB1Free-machining; excellent dimensional accuracy for threaded parts
C93700High-Lead Tin Bronze (80-10-10)BS 1400 LB4EN 1982 CC495K / CuSn10Pb10DIN 1705 G-CuSn10PbJIS H5111 BC4IS 318Superior machinability; used for precision-threaded connector bodies
C95400Aluminum Bronze (9%)BS 1400 AB1 / CA104EN 1982 CC331G / CuAl10Fe3DIN 1714 G-CuAl10FeJIS H5111 AlBC1IS 318 Grade AB1High strength, moderate conductivity; substation & marine
C95500Nickel-Aluminum Bronze (9%)BS 1400 AB2 / CA105EN 1982 CC333G / CuAl10Fe5Ni5DIN 1714 G-CuAl10FeNiJIS H5111 AlBC2IS 318 Grade AB2Maximum strength & corrosion resistance; offshore & power stations
C95800Nickel-Aluminum Bronze (Cast)BS 1400 AB3EN 1982 CC334G / CuAl9Fe4Ni4MnDIN 1714 G-CuAl9NiFeMnJIS H5111 AlBC3IS 318Best marine corrosion resistance; critical substation hardware
C10100 / C10200Oxygen-Free Copper (OFC)BS EN 13601 CW008ACW008A / Cu-OFOF-Cu (DIN 1787)JIS H3100 C1020IS 191 Grade OFCUltra-high conductivity (~101% IACS); sensitive electrical contacts
C17200Beryllium CopperBS 2873 CB101EN 12163 CW101C / CuBe2DIN 17672 CuBe2JIS H3270 C1720IS 7811Highest strength copper alloy; spring contacts & precision connectors
C51000Phosphor Bronze (5%)BS 2874 PB101EN 12163 CW450K / CuSn5DIN 17672 CuSn6JIS H3270 C5100IS 7811Spring quality; excellent fatigue resistance; contact springs
C52100Phosphor Bronze (8%)BS 2874 PB102EN 12163 CW451K / CuSn8DIN 17672 CuSn8JIS H3270 C5210IS 7811Higher 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.

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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.

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