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CISA 5C032 21 mm Backset Narrow-backset latch-and-bolt mortise lock (15C032200)

Narrow-backset latch-and-bolt mortise lock: Backset: 21 mm; Faceplate ends: Rounded 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.

15C032200 backset 21 mm measurement-reference diagram; not a product view
Drawn by this site from the explicit dimensions of the corresponding model; the diagram is not to scale and is not a drilling template.

Specifications

Backset
21 mm
Faceplate ends
Rounded 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

15C032200 is an explicit ordering row in the 5C032 series with backset 21 mm. The round-ended faceplate and smaller backset suit door-edge configurations with limited space. The catalogue lists this series as a replacement for 5C031, 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 21 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

CISA 2026 English catalogue, PDF page 345 / printed page 341

Manufacturer documents are provided in their original language.

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AboutManufacturer documents are provided in their original language.