What Are Brass Split Bolt Connectors?
Brass split bolt connectors (also known as split bolt clamps, wire mesh connectors, or parallel groove connectors) are specialized electrical connectors used for joining two or more conductors — solid or stranded wire — in grounding, bonding, and splicing applications. The connector features a split body with a bolt and nut that tightens around the conductors, creating a gas-tight, mechanically secure, and electrically conductive joint. Jamnagar Brass Components manufactures premium-grade brass split bolt connectors that meet UL, ASTM, and NEC standards for the US electrical market.
Types of Brass Split Bolt Connectors We Manufacture
Standard Brass Split Bolt Connectors (Single Conductor)
Designed for connecting a single run conductor to a tap conductor. Available for wire sizes AWG #10 through 750 kcmil to serve US residential and commercial wiring requirements. Manufactured from free-cutting brass (UNS C36000) for excellent machinability and conductivity.
Twin Conductor Brass Split Bolt Connectors
These connectors accommodate two run conductors simultaneously, ideal for high-amperage grounding circuits and utility applications. Popular with US electrical contractors for bus bar installations and service entrance splices.
Reducing Split Bolt Connectors
Used to connect conductors of different sizes (e.g., main run #2 AWG to tap conductor #6 AWG). The reducing slot keeps smaller conductors perfectly aligned. Widely used in US electrical panel upgrades and grounding system retrofits.
Copper-Clad Brass Split Bolt Connectors
Copper-clad brass provides enhanced conductivity for sensitive electrical applications while retaining the mechanical strength and cost advantage of brass. Ideal for UL Listed assemblies requiring higher conductivity.
Nickel-Plated Brass Split Bolt Connectors
Nickel plating provides additional corrosion resistance for outdoor, marine, and industrial environments. Suitable for direct burial when used with appropriate weatherproof tape or heat-shrink protection.
Material Grades and International Equivalents
| Property | India (IS) | USA (ASTM/UNS) | UK (BS) | Germany (DIN) | Specification |
|---|---|---|---|---|---|
| Free Cutting Brass | IS 319 Type I | UNS C36000 | BS 2874 CZ121 | DIN CuZn39Pb3 | Primary body material |
| Naval Brass | IS 291 Gr-1 | UNS C46400 | BS CZ112 | DIN CuZn38Sn1 | Corrosion-resistant option |
| Electrolytic Copper | IS 191 Grade E | UNS C11000 | BS 2874 C101 | DIN CuETP | Copper-clad variant |
| Hexagonal Brass Rod | IS 6912 | ASTM B16 | BS 2874 | DIN 17660 | Nut and bolt material |
Key Technical Specifications
- Wire Range: AWG #10 to 750 kcmil (2.6mm² to 380mm²)
- Thread Standard: UNC (Unified National Coarse) for US market; Metric available on request
- Material: Free-cutting brass UNS C36000 (standard); Naval brass, copper-clad options available
- Plating: Natural brass, nickel-plated, tin-plated
- Standards Compliance: NEC Article 250 (Grounding), UL 486A-486B, ASTM B283
- Temperature Rating: 75°C / 90°C conductor rated
- Conductor Type: Suitable for solid, stranded, and compact conductors (copper and aluminum with bi-metal bolt)
Applications of Brass Split Bolt Connectors
- Residential Electrical Grounding – Grounding electrode conductor splices per NEC Article 250
- Commercial Buildings – Bus bar connections, grounding grid installations
- Utility & Power Distribution – Transformer grounding, substation bonding
- Industrial Plants – Equipment grounding, bonding of metal structures
- Telecommunications – Tower grounding, data center bonding
- Solar & Renewable Energy – PV system grounding conductors
Why Source Brass Split Bolt Connectors from Jamnagar?
- US Market Expertise – Products designed to meet NEC, UL 486, and ASTM requirements familiar to US electrical engineers and inspectors.
- Precision CNC Machining – Tight-tolerance split body, uniform thread form, and consistent clamping force in every batch.
- Bulk Pricing Advantage – Factory-direct pricing up to 40% lower than US-stocked equivalents from Burndy, Ilsco, or Blackburn.
- Custom Sizes & AWG Ranges – Non-standard wire size combinations available on request.
- Full Traceability – Material certs, dimension reports, and lot traceability for every shipment.
- Private Label / OEM Branding – Custom packaging and labelling available for US distributors.
Frequently Asked Questions (FAQ)
Q: Are your brass split bolt connectors UL Listed?
A: Our connectors are manufactured to UL 486A-486B material and dimensional standards. Full UL listing is available on request for customers requiring listed products for their specific applications.
Q: Can brass split bolt connectors be used with aluminum conductors?
A: Standard brass split bolts are designed for copper conductors only. For aluminum-to-copper connections, we supply bi-metal (AL/CU rated) split bolt connectors with anti-oxidant compound as required by NEC.
Q: What is the torque specification for brass split bolt connectors?
A: Torque values vary by wire size. We provide a torque specification chart with every order, aligned with UL 486 and manufacturer recommendations (typically 15–120 in-lbs depending on size).
Q: Do you supply self-amalgamating tape or connector insulation kits?
A: Yes, we can supply complete kitting — brass split bolt connectors packed with self-amalgamating tape, heat-shrink tubing, or vinyl electrical tape for ready-to-install kits popular with US electrical distributors.
Q: What is the lead time for split bolt connectors from Jamnagar?
A: Standard sizes are typically available within 2–4 weeks from order confirmation. Custom sizes or special plating may require 4–6 weeks. Air freight options available for urgent requirements.
Contact Us for Brass Split Bolt Connectors
For pricing, samples, and technical enquiries on brass split bolt connectors from Jamnagar, reach out to our export team at Jamnagar Brass Components.
📧 Email: sales@jambrass.com
🌐 Website: www.jambrass.com