CISA 5C012 25 mm Backset Narrow-backset latch-and-bolt mortise lock (15C012250)

Lock and fitting dimensions

Check the backset, centre distance, faceplate and mounting points against the specific model drawing.

Specifications

Backset

25 mm

Faceplate ends

Square ends

Faceplate width

22 mm

Centre distance

85 mm

Bolt throws

1

Bolt/latch configuration

Latch and bolt

Case

Galvanized steel

Bolt thickness

9.5 mm

Construction and operation of this version

15C012250 is an explicit ordering row in the 5C012 series with backset 25 mm. The square-ended faceplate and smaller backset suit door-edge configurations with limited space. The catalogue lists this series as a replacement for 5C011, but whether the recess can remain unchanged must still be checked against the actual door openings and old lock dimensions.

How to check installation dimensions

This model's backset is 25 mm, the distance from the specified door-edge faceplate reference to the operating axis. Faceplate width, centre distance and external lock-body depth describe different directions and must not substitute for one another.

For replacement, record the old lock's full number, faceplate-end shape, inside and outside operating components and strike positions; when changing handing or linked rods, confirm interfaces according to the product instructions.

Limitations

• The table explicitly gives backset 21 mm for 20 in the model number; dimensions follow the table and are not inferred from the code.
• Series certification and catalogue descriptions of fire or escape applications do not mean this model meets current requirements when installed in any door assembly.
• Check accessories against the corresponding model and installation instructions; Cylinders, rods and escutcheons listed as available on request are not standard equipment.

Sources

Manufacturer documents are provided in their original language.

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