All of  the mortise locks in the 968 Series feature the same size mortise case shown here.

Case Depth: 54mm (2 1/8")

Case Height: 95mm (3 3/4")

Case Thickness: 12mm (4/8")

Faceplate width: 18mm (12/16")

Faceplate length: 135mm (5 5/16")

Backset: 30mm (1 3/8") distance from front of faceplate to center of handle/keyhole

For privacy and locking models only (968WC, 968 & 968ZK):

Centers: 55mm (2 3/16") distance from center of handle hole to center of keyhole.

923 Strike Plate (for models 968WC, 968 & 968ZK)

Length: 94mm

Width: 18.5mm

Tongue width: 31mm

Tongue/Lip Length: 10mm standard length in stock (dimension of 41mm is 20.5 on stock strikes).

923F Strike Plate (for model 968F)