TaperThreadedCouplers - Darmaa Metal Product

Taper Threaded Couplers

Self-locking tapered thread geometry delivers full structural integrity in just 2-4 turns the fastest threaded splice system for high-volume civil and heavy construction.

16-40mm

Bar Range

Taper

Thread

2-4

Turns

Self-Lock

Locking

See What Fits Your Needs

Speed Without Compromise

Taper Threaded Couplers use a conical thread design for quick, secure connections that resist loosening under dynamic loads, while enabling faster and easier installation.

Conical thread form ensures tight, self-locking engagement
Requires fewer rotations compared to parallel thread systems
Generates radial compressive forces to resist vibration and loosening
Tapered entry allows easy alignment, even in confined spaces
Ideal for bridges, marine structures, and high-speed construction projects

Rapid Install

Self-Locking

Seismic

The Taper Advantage

2-4 Turns Only:
Dramatically fewer rotations than parallel thread, faster make-up times and reduced fatigue in high-volume operations.

Inherent Self-Lock:
Wedging taper geometry generates its own locking force, no separate locking nut or thread-locking compound required.

Self-Aligning: Entry
Tapered bore guides bar into engagement, tolerating minor positional deviation between bar ends.

Vibration Resistant:
The locking taper resists loosening under vibratory and cyclic loads approved for seismic design categories.

Four Steps to a Verified Connection

Cut Square

Rebar end is cut perpendicular to the bar axis with a mechanical cutter no torch cuts.

Taper Thread

A taper-threading die is run onto the bar end, typically 3–5 passes to produce the full tapered profile.

Engage Coupler

Bar is threaded into the coupler 2–4 turns using a pipe wrench or torque wrench to specified torque.

Verify

Thread engagement is visually confirmed and torque mark is applied, connection is complete and certified.

Available Bar Sizes

Size ID (mm)	Thread Pitch (mm)	Size OD (mm)	Length (mm)	Material
16	20 × 2.5	28	40	EN8D
20	24 × 3	32	48	EN8D
25	29 × 3	40	60	EN8D
32	35 × 3	50	72	EN8D
40	45 × 4	63	90	EN8D

Industries We Serve
Our couplers are trusted across diverse sectors that demand performance without compromise.

Industrial Construction

Infrastructure & High-Rise Buildings

Bridges & Metro Projects

Commercial Complexes

Residential Projects

Darmaa Metal Product