Replacing an offset espag lock with a U-shaped faceplate? On a U-rail espag window lock the faceplate is a U-shaped channel, and the handle spindle is set back from it. We stock Avocet offset U-rail espag locks, including a 16mm U-rail and a slimline version.
Match the backset, U-rail width and length of your old lock. For a flat strip, see offset flat faceplate espags.
From the face of the faceplate to the centre of the spindle hole. 20mm and 22mm are common.
Measure across the U-shaped channel, for example 16mm.
Measure the overall length and note the position of each locking cam.
Look for Avocet or another name on the faceplate.
Open the window fully and remove the handle. Undo the screws along the faceplate on the edge of the sash and ease the old lock out of its groove. Fit the new lock in the same position, refit the screws and handle, and check it locks smoothly with the window open before you close it.
An espag window lock whose faceplate is a U-shaped channel instead of a flat strip.
No. The faceplate must match the groove in your window sash.
Browse all uPVC window locks: inline espag, offset flat faceplate, offset U-rail, shootbolt and window keeps.
Not sure which window lock you have? Send us a photo of the faceplate and gearbox with a tape measure in shot, and we'll match it for you.
Send us a photo to identify your partMonday to Friday, 8:30–12:30 and 13:00–15:30
