Couplers
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Our Coupler Solutions
At Ennaar Infra Solutions LLP, we specialize in manufacturing parallel threaded mechanical couplers designed to join steel reinforcement bars (rebars) with high strength, accuracy, and ease of installation. Our coupler systems support 12mm to 40mm diameter bars, making them ideal for high-rise buildings, bridges, tunnels, dams, and metro infrastructure.
Our couplers are:
- ISO 9001:2015 Certified
- Compliant with IS 16172:2014, BS 8110, and ACI 318-14
- Tested for tensile strength, ductility, and seismic load performance
1. Parallel Threaded Couplers
Our EISL Parallel Threaded Couplers provide a full-strength connection without reducing the rebar’s cross-section. Using cold forging and parallel threading, they allow bar-to-bar connection with a simple screw-in action — no torque wrench required.
Features:
- For 12mm–40mm rebars
- Parallel-threaded, non-tapered design
- Ensures full ductile elongation of bars
- Fast and simple bar rotation installation
- Individually marked for traceability
Types Available:
- Type A – Standard Coupler: Both bars can be rotated.
- Type B – Seismic Coupler: For earthquake-prone zones (tested under reverse cyclic loads).
- Type C – Position Coupler: For fixed bars, includes lock-nut to hold the second bar in place.
Applications:
- Slabs & Columns
- Beams & Retaining Walls
- Precast Structures & Cages
- Metro, Tunnel, and Bridge Components
2. Reducer Couplers
Our Reducer Couplers solve the challenge of splicing reinforcement bars of unequal sizes without manual tapering or cutting.
Features:
- Precision-threaded for dissimilar bar sizes
- Maintains axial alignment and full load transfer
- Saves rebar wastage and simplifies design flexibility
- Compatible with standard threading machines
Applications:
- Bridge piers with size transitions
- Column-to-footing connections
- Retrofitting & structure modification zones
- Precast element transitions
Rebar Preparation Process
Our couplers use a 3-step preparation system to ensure secure and durable connections:
Cutting: Rebar ends cut square
Cold Forging: Ends enlarged to increase core strength
Threading: Parallel threads formed to match coupler dimensions
All couplers are tested and batch-coded for traceability and QA compliance.
Delivered with Equipment & Support
We offer:
- Containerized site setup for cutting, forging & threading
- Machine supply and operational training
- On-site supervision & installation guidance
- Technical consultation for custom requirements
Tested and Certified
- Tensile and ductility tested
- Reverse cyclic (seismic) load compliant
- Dimensional and thread conformity inspected
- Quality inspection reports available on request
Where Our Couplers Are Used
- Metro Rail & Urban Infrastructure
- Bridges & Flyovers
- High-Rise Buildings
- Dams, Tunnels & Foundations
- Precast Concrete Elements
- Seismic Zone Reinforcement
Our Esteemed Customers
Questions? You Need Answer
Everything you need to know about our coupler systems