BoltNEX lock-shear bolted rebar coupler system

Konnexa Bolt NEX Coupler Series

The Konnexa BoltNEX Series is a high-efficiency mechanical splicing system engineered for rapid deployment and robust structural alignment in reinforced concrete construction. Hardened lock-shear bolts and a high-friction internal matrix create a self-verifying, torque-tightened mechanical connection that ensures high-integrity load transfer under both tension and compression.

Applications Examples

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The Konnexa advantage - Switching from traditional lapping to the Konnexa Series typically delivers a 15-20% reduction in total steel consumption while significantly shortening structural installation timelines.

Technical Specifications

Core features engineered forrapid deployment

Zero Bar Preparation

No on-site forging, threading or cutting. Performs on standard, sheared or flame-cut bar ends straight off the bundle.

Lock-Shear Technology

Bolt heads shear off the instant engineered torque is reached — a visual, tamper-evident proof of correct clamping force.

High-Friction Matrix

Hardened internal grip-ridges bite into the rebar, delivering high slip resistance right up to ultimate tensile load.

Universal Compatibility

Fe 500 / 550D, Grade 60 / 75 from 16–40 mm — including seamless splicing of mismatched bar diameters in one sleeve.

Full-Strength Splice

A complete mechanical splice in tension and compression, with no welding and no thread-rolling required on the bar.

100% Traceability

Unique batch and product identification for full QA, mill-to-site documentation and code-compliant handover.

Key Features

No threads. No welding.
No compromise.

BoltNEX™ pairs hardened-steel gripping science with a shear-verified bolt pattern to behave as a monolithic continuation of the parent bar — under static, cyclic and seismic loading alike.

Structural Performance

Full-strength mechanical splice in tension & compression
High-friction internal matrix resists slip at ultimate load
Reliable fatigue & cyclic behaviour for seismic zones
Hardened sleeve tuned to high-yield Fe 500 / 550D bars

Installation & Speed

Zero bar prep — no threading, forging or welding
Lock-shear bolts give instant visual verification
Standard torque tools only; minimal crew training
Built for repair, retrofit & inaccessible locations

Quality & Compliance

Code-compliant: IS 16172, ISO 15835, ACI, ASTM, EC2
100% traceable batch & product identification
Precision CNC-machined hardened components
Suited to new build, extension & rehabilitation

Standards and Compliance

Certified to the world's mostrigorous structural codes.

BoltNEX is engineered to comply with the performance requirements of globally recognized mechanical splice standards.

IS 16172

Mechanical Splices for Reinforcing Bars

ISO 15835

Mechanical Splices for Reinforcing Steel

ACI 318 & ACI 439

Mechanical Splice Requirements

ASTM A1034 / A1034M

Mechanical Splices for Steel Reinforcing Bars

EN 1992-1-1 (Eurocode 2)

Design of Concrete Structures

IS 1786 / A615 / A706 / BS 4449

Compatible Reinforcement Bar Standards

BoltNEX™ is compatible with reinforcing bars manufactured to IS 1786, ASTM A615 / A615M, ASTM A706 / A706M and BS 4449, subject to project-specific qualification testing and design requirements.

Installation Sequence

Three steps to a bolted, load-ready splice

No threading machine. No welding set. Just a sleeve, the bars and a torque tool — performed in sequence, directly on site.

Position the Coupler

Slide the BoltNEX™ sleeve over the first bar end. No threading, no grinding — sheared or flame-cut ends are accepted exactly as they arrive on site.

Insert the Second Bar

Bring the mating bar into the opposite end until both bars seat on the internal stop. Mismatched diameters? The bolted grip still takes it.

Tighten & Shear

Drive the locking bolts with a standard torque tool. Each head shears off at the engineered torque — the install is complete and visually verifiable.

The BoltNEX™ Solution

BoltNEX™ removes the limitations of traditional splicing by gripping the parent bar with hardened, shear-verified bolts instead of rolled threads. The result is a mechanical splice that is faster to install, tolerant of imperfect bar ends, and stronger than the reinforcement bar itself.

Applications

From retrofits to rising towers, BoltNEX™ holds fast.

Engineered for projects where a mechanical splice must perform as reliably as the parent bar itself — and where the clock, the access and the existing structure leave no room for bar preparation.

Residential & Commercial

High-Rise Towers

Elevated Corridors

Bridges & Flyovers

Underground Structures

Metro & Tunnels

Critical Infrastructure

Precast Structures

Industrial plants and power generation facilities
Marine and port infrastructure
Dams, water treatment & water-retaining structures
Seismic-resistant reinforced concrete structures

Why BoltNEX

Where speed & flexibility cannot be sacrificed.

Fast installation. Reliable connections. Engineered for every challenge. BoltNEX™ offers a practical and dependable mechanical splicing solution for situations where speed, flexibility and structural performance are essential — maintaining the strength, durability and reliability expected from Konnexa's engineered reinforcement systems.