Precon Products, A leading national independent supplier of construction products


MBT Couplers

The MBT range of couplers provides a cost-effective method of joining reinforcing bars, particularly when the fixed bar is already in place and there is insufficient space for a hydraulic swaging press.

MBT Couplers are easy to install and achieve failure loads higher than 115% of the characteristic yield strength of grade 500 reinforcing bar. Neither bar end preparation to form threads, nor bar rotation are required.

MBT couplers can also be used to join imperial, plain round or deformed reinforcing bars.

The bar ends are supported within the coupler by two serrated saddles, and as the lockshear bolts are tightened, the conical ends embed themselves into the bar. As this happens the serrated saddles bite into both the bar and the shell of the coupler. The lockshear bolts of couplers up to and including the ET20 can be tightened using a ratchet wrench. For larger couplers a nut runner is recommended.

In all cases heavy duty sockets should be used. When the pre-determined tightening torque for the bolts is reached, the heads shear off leaving the top of the installed bolt slightly proud of the coupler. This provides an instant visual check of correct installation.

Note: Impact tools must not be used to tighten lockshear bolts.

Sold singly


  • Fully tested and approved
  • Fast and simple to install
  • No need for bars to be threaded
  • No need for expensive equipment
  • No need for trained personnel on site
  • Can be installed in awkward situations
  • Full range available
  • Cost effective solution
Bar Diameter (mm)121620253240
External Diameter (mm) d 33.4 42.2 48.3 54.0 71.0 81.0
Total Length (mm) l 140 160 204 258 312 484
Socket Size A/F (ins) 1/2 1/2 1/2 5/8 5/8 3/4
No. of Bolts 6 6 8 8 10 14
Approx Weight (kg) 0.72 1.25 1.96 3.00 6.50 11.30
Torque (Nm) 55 108 108 275 360 525
Part No. ET12 ET16 ET20 ET25 ET32 ET40

 Notes: Other sizes available on request. For details contact Ancon Building Products.

MBT Couplers main image

MBT Couplers

Our latest catalogue is now available

Download a digital version or request a hard copy delivered directly to your door.

Get your copy nowPrecon catalogue front cover