Bronze Grounding Couplers, Earth Rod Couplers & Threaded Couplers
Cable Glands India is a trusted manufacturer and global exporter of Bronze Grounding Couplers, Earth Rod Couplers, and Threaded Ground Rod Connectors, delivering precision-engineered earthing components to power, telecom, marine, and industrial sectors worldwide. With three decades of proven manufacturing expertise, we combine advanced CNC technology with premium Bronze alloys to deliver grounding solutions that stand up to the harshest environmental conditions.
Product Overview – Bronze Grounding Couplers
Our Bronze Grounding Couplers are purpose-built to extend and interconnect ground rod installations, creating robust, low-resistance pathways for fault current dissipation. Machined from high-strength C95500 and C95600 Aluminum Bronze alloys, every coupler offers outstanding electrical conductivity, exceptional tensile integrity, and remarkable resistance to galvanic and soil corrosion. Whether you’re building a new earthing grid or deepening an existing installation, our grounding couplers deliver reliable, long-term performance with minimal maintenance requirements.
Price: USD 11.50 per kilogram | Custom pricing available for bulk and OEM orders
Types of Bronze Grounding Couplers & Earth Rod Connectors
1. Bronze Grounding Couplers
Our flagship Bronze Grounding Couplers are manufactured from premium Silicon Bronze and Aluminum Bronze alloys, striking the ideal balance between conductivity, strength, and corrosion immunity. Precision UNC threading ensures a secure, metal-to-metal connection every time, while consistent dimensional accuracy — achieved through automated CNC machining — guarantees proper fit across all standard ground rod diameters. These couplers are the go-to choice for underground, marine, and industrial installations demanding decades of maintenance-free service.
2. Earth Rod Couplers
Engineered specifically for heavy-duty earthing in power substations, lightning protection networks, and utility distribution systems, our Earth Rod Couplers handle significant mechanical loads during both installation and long-term operation. High-strength Bronze alloys and machined contact surfaces minimize joint resistance while the standardized UNC thread profile ensures compatibility with internationally sourced ground rods. IEC 62561-1 compliance makes them the preferred choice for lightning protection designers and electrical engineers worldwide.
3. Threaded Ground Rod Connectors
Versatility defines our Threaded Ground Rod Connectors. Available in a broad range of UNC thread diameters, these connectors accommodate virtually any ground rod system in use today. Manufactured with tight threading tolerances (±0.02 mm) using advanced CNC thread-cutting equipment, they deliver consistent mechanical grip and stable electrical contact. Their tool-free hand-start design simplifies field installation while the robust Bronze construction ensures the connection remains intact through ground movement, thermal cycling, and chemical exposure.
4. Ground Rod Joint Couplers
Designed for configurations requiring multiple rod assemblies or unconventional layouts, our Ground Rod Joint Couplers feature precision-bored internal threading that cleanly accepts 1/2″, 5/8″, and 3/4″ rods. Cast and finish-machined to exacting tolerances, each joint coupler provides dimensional repeatability batch after batch. Their Bronze composition neutralizes the risk of galvanic degradation even in chemically aggressive soils, making them a reliable choice for 25+ year buried installations.
5. Grounding Rod Couplings (Extended Depth)
When a grounding electrode must reach low-resistivity soil layers below the standard rod depth, our Grounding Rod Couplings provide the extension mechanism you need. With tensile strength exceeding 300 MPa and a minimum electrical conductivity of 15% IACS, these couplings maintain the structural and electrical integrity of your grounding system at any depth. Their weatherproof Bronze construction performs equally well in offshore, underground, and chemically challenging industrial environments.
6. Copper-Bonded Ground Rod Couplers
For projects where budget constraints are a primary driver, our Copper-Bonded Ground Rod Couplers offer an economical alternative without sacrificing basic grounding effectiveness. A permanently bonded Copper layer over a steel core provides adequate conductivity for standard commercial and residential applications. While these couplers suit many everyday installations, clients seeking superior longevity and corrosion resistance in demanding environments are encouraged to specify our solid Bronze alternatives.
Technical Specifications & Dimensional Data
Standard UNC Thread Sizes & Dimensions
| Thread Size | Outer Dia (mm) | Internal Thread | Length (mm) | Approx. Weight (g) |
| 1/2″ UNC | 19.05 | 1/2″-13 UNC | 50.8 | 125 |
| 5/8″ UNC | 23.81 | 5/8″-11 UNC | 63.5 | 195 |
| 3/4″ UNC | 28.57 | 3/4″-10 UNC | 76.2 | 285 |
| 7/8″ UNC | 33.34 | 7/8″-9 UNC | 88.9 | 395 |
| 1″ UNC | 38.10 | 1″-8 UNC | 101.6 | 525 |
Material Properties – Bronze Alloy Grades
| Property | C95500 Bronze | C95600 Bronze | Test Standard |
| Tensile Strength | 310–380 MPa | 280–350 MPa | ASTM B557 |
| Yield Strength | 140–200 MPa | 130–180 MPa | ASTM B557 |
| Electrical Conductivity | 15–18% IACS | 12–15% IACS | ASTM B193 |
| Hardness | 85–105 HB | 75–95 HB | ASTM E18 |
| Density | 8.7 g/cm³ | 8.5 g/cm³ | ASTM B311 |
| Thermal Expansion | 18×10⁻⁶/°C | 17×10⁻⁶/°C | ASTM E228 |
Electrical & Environmental Performance
| Parameter | Value |
| Contact Resistance | < 50 micro-ohms |
| Fault Current Capacity | Up to 5,000 A |
| Max System Voltage | 35 kV |
| Operating Temperature | -40°C to +85°C |
| Soil pH Compatibility | pH 4–9 |
| Installation IP Rating | IP67 (when correctly installed) |
| Expected Service Life | 25–30 years underground |
International Standards & Compliance Certifications
All Bronze Grounding Couplers and Earth Rod Couplers supplied by Cable Glands India are manufactured in accordance with the following internationally recognised standards:
- UL 467 – Grounding and Bonding Equipment (USA)
- IEEE 80 – AC Substation Grounding Safety Guide (International)
- IEC 62561-1 – Lightning Protection System Components (International)
- ASTM B584 – Copper Alloy Sand Castings Specification (USA)
- BS EN 62561-1 – Lightning Protection Components (Europe)
- IS 3043 – Code of Practice for Earthing (India)
- NEC Article 250 – Grounding and Bonding (USA)
- AS/NZS 1768 – Lightning Protection (Australia / New Zealand)
Quality Management Certifications
- ISO 9001:2015 – Quality Management System
- ISO 14001:2015 – Environmental Management
- OHSAS 18001 – Occupational Health & Safety
- CE Marking – European Conformity
- UL Listing – Product Safety Certification
- RoHS Compliance – Restriction of Hazardous Substances
Bronze Alloy Grade Reference Table
| Standard | Grade | Composition | Typical Application |
| ASTM B584 | C95500 | Cu-Al-Ni-Fe | High-strength & substation grounding |
| ASTM B584 | C95600 | Cu-Al-Ni-Fe | Marine & coastal installations |
| BS 1400 | AB1-C | Aluminum Bronze | Heavy industrial sites |
| DIN 17025 | CuAl10Fe5Ni5 | German Bronze | European market projects |
| JIS H5120 | CAC701 | Japanese Bronze | Asia-Pacific applications |
| IS 318 | Grade-1 Bronze | Indian Standard | Indian domestic market |
| EN 1982 | CC333G | European Bronze | EU compliance projects |
Industries & Applications Served
Power Generation & Electrical Utilities
Transmission substations, power generation plants, and distribution networks rely on our Bronze Grounding Couplers for critical safety earthing. High fault current capacity (up to 5,000 A) and low contact resistance ensure fast, safe dissipation of overcurrent events, protecting both personnel and expensive assets.
Telecommunications & Data Infrastructure
Cell towers, data centers, and telecommunications exchange buildings require stable, low-impedance grounding to protect sensitive electronics and maintain signal integrity. Our Threaded Ground Rod Connectors deliver the reliable, repeatable earthing connections that telecom engineers depend on.
Marine & Offshore Environments
Saltwater and humid coastal conditions accelerate corrosion in lesser materials. The inherent galvanic stability of Aluminum Bronze makes our Earth Rod Couplers the preferred specification for port facilities, offshore platforms, and marine vessel grounding systems where longevity is non-negotiable.
Industrial Manufacturing Facilities
Chemical processing plants, steel mills, and heavy manufacturing operations expose grounding hardware to aggressive chemicals, elevated temperatures, and mechanical stress. Our Bronze couplers resist all of these, maintaining reliable personnel safety earthing throughout the operational life of the facility.
Mining Operations
Both underground and surface mining sites carry inherent explosion and static discharge risks. Robust, corrosion-resistant Bronze Grounding Couplers from Cable Glands India provide the dependable ground fault protection these high-risk environments demand.
Commercial & Residential Construction
From multi-storey office towers to residential complexes, our grounding rod connectors help electrical contractors achieve NEC and IS 3043 compliance efficiently and cost-effectively. Easy UNC thread installation requires no special tooling, reducing on-site labour time.
Manufacturing Process & Quality Control
Every Bronze Grounding Coupler from Cable Glands India passes through a rigorous, multi-stage production process designed to guarantee consistent quality across every batch and every order:
| Production Stage | Technology / Method | Quality Check |
| Raw Material Verification | Spectroscopic alloy analysis | Chemical composition certification |
| Precision Sand Casting | Automated casting lines | Dimensional inspection post-casting |
| CNC Machining | 5-axis CNC machining centres | Thread pitch verification |
| Thread Cutting | Dedicated UNC threading equipment | Go/No-go gauge testing per part |
| Surface Finishing | Controlled tumbling & polishing | Surface roughness: Ra ≤1.6 µm |
| Final Inspection | Coordinate measuring machines | Conductivity & dimensional audit |
| Packaging | Corrosion-inhibiting wrapping | Packing list & certificate check |
Manufacturing Tolerances
| Dimension | Permitted Tolerance | Measurement Instrument |
| Thread Pitch | ±0.02 mm | Thread pitch gauge |
| External Diameter | ±0.05 mm | Precision micrometer |
| Overall Length | ±0.10 mm | Digital caliper |
| Concentricity (TIR) | 0.05 mm max | CMM inspection |
| Surface Finish | Ra 1.6 µm max | Surface roughness tester |
Production Lead Times & Order Flexibility
Standard production and dispatch is completed within 4–6 weeks from confirmed order receipt. Expedited orders can be fulfilled in 2–3 weeks subject to availability, with applicable priority pricing. Large-volume and blanket-order timelines are agreed individually to align with project schedules.
| Production Phase | Estimated Duration | Key Activities |
| Material Sourcing & Testing | 5–7 days | Bronze alloy procurement, spectroscopy |
| Casting Operations | 8–10 days | Sand casting, cooling, inspection |
| CNC Machining & Threading | 10–12 days | Dimensional machining, thread cutting |
| Quality Testing | 3–4 days | Electrical, mechanical & dimensional testing |
| Finishing & Packaging | 2–3 days | Polishing, corrosion protection, packing |
| Shipping Preparation | 1–2 days | Documentation, labelling, dispatch |
Frequently Asked Questions
Q1: Which Bronze alloys are used and why?
We use C95500 and C95600 Aluminum Bronze — alloys proven to deliver 15–18% IACS electrical conductivity, tensile strengths above 300 MPa, and exceptional resistance to soil, chemical, and marine corrosion. These alloys outperform brass (susceptible to dezincification) and Copper (lower mechanical strength) across almost every underground earthing scenario.
Q2: How long will Bronze Grounding Couplers last underground?
In soils with pH between 4 and 9, properly installed Bronze Grounding Couplers reliably achieve a 25–30 year service life. Marine-environment installations may see 20–25 years depending on salinity and soil chemistry. No competitor material comes close to this durability at a comparable price point.
Q3: Are your couplers certified for lightning protection systems?
Yes. Our Earth Rod Couplers are fully compliant with IEC 62561-1 and BS EN 62561-1, the primary international standards governing lightning protection components. Their high fault current tolerance, low impedance, and mechanical robustness make them a natural fit for lightning protection earthing grids.
Q4: What thread sizes do you manufacture?
We produce UNC threads in 1/2″, 5/8″, 3/4″, 7/8″, and 1″ diameters as standard, all conforming to ANSI/ASME B1.1. Metric threading and custom pitch specifications are available for OEM customers upon request.
Q5: What installation tools are needed?
No specialist equipment is required. Our couplers hand-start onto the rod thread, then are secured with a standard adjustable wrench and a suitable thread lubricant for outdoor or underground use. This simple installation process keeps labour costs low and minimises on-site delays.
Q6: Do you offer OEM and private-label services?
Absolutely. We offer full customisation including proprietary thread specifications, bespoke alloy compositions, custom dimensions, private labelling, and customer-branded packaging. Minimum order quantities and lead times for OEM programmes are discussed at the quotation stage.
Packaging & Global Shipping
Each Bronze Grounding Coupler is individually wrapped in corrosion-inhibiting paper and sealed in a moisture-resistant polyethylene bag with desiccant. Secondary packaging in reinforced corrugated cartons with foam cushioning protects products during transit. International shipments travel in ISPM-15 compliant wooden crates with full moisture barriers.
We ship worldwide via established freight-forwarding partners, providing complete documentation including commercial invoices, certificates of origin, packing lists, and material test certificates. Air freight is available for urgent project requirements. Custom labelling and client-branded packaging are available for all regular customers.
Why Choose Cable Glands India for Bronze Grounding Couplers?
- 30+ Years of Manufacturing Experience – A proven track record across thousands of global installations with zero reported failures in critical earthing applications.
- State-of-the-Art CNC Technology – DMG MORI and Haas Automation machining centres guarantee dimensional consistency and superior thread quality on every piece.
- Full International Compliance – UL 467, IEEE 80, IEC 62561-1, ASTM B584, IS 3043, and more — we have the certifications your project specifications require.
- Complete Customisation Capability – From thread geometry to alloy grade to packaging branding, we tailor every aspect of the product to your exact requirement.
- Competitive Direct-Manufacturer Pricing – No distributor mark-ups. Volume discounts and flexible payment terms for established international customers.
- Dedicated Technical Support – Our application engineering team assists with earthing system design, coupler selection, installation guidance, and post-delivery support.
- Reliable Global Logistics – Established freight partnerships ensure on-time delivery with full tracking and shipment insurance to any destination worldwide.
Get a Quote – Bronze Grounding Couplers & Earth Rod Couplers
Ready to source high-quality Bronze Grounding Couplers, Earth Rod Couplers, or Threaded Ground Rod Connectors for your next project? Our team is available to provide technical recommendations, customised quotations, and fast order processing.
Email: sales@cableglandsindia.com
Phone / WhatsApp: +91-22-43449300
Website: www.cableglandsindia.com
Share your project specifications, required quantities, and preferred delivery timeline — and we’ll respond with a detailed quotation within one business day.