ABT Replacement Door Locks, often found on a St Helens upvc door lock mechanism.
Replacement ABT upvc door gearbox with faceplate and snib. The A.B.T lock was widely used by St Helens glass as their door lock.
A.B.T St Helens match replacement door lock has a 32mm B/set. Sometimes used on aluminimum doors as a centre door gearbox as well.
Door lock case suits old St Helens door lock as well as other suppliers, Connects to top and bottom locking rods concealed in door jamb.
Removal of the old ABT door lock case is somewhat fiddly as the top and bottom shoot bolt connector are screwed into the door lock plate casing. They are fed in through the top or bottom through a routed hole and screwed into place.
We have found that if possible it is easier to remove the door sash and lay it on it's side so that you can get to either end.
