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CISA 56250 60 mm Backset Three-throw latch-and-bolt mortise lock (156250600)

Three-throw latch-and-bolt mortise lock: Backset: 60 mm; Faceplate width: 25 mm; Centre distance: 85 mm; Bolt/latch configuration: Nickel-plated steel latch and bolt; Bolt throws: 3; Connection configuration: Central locking; Supplied strike: 1.06271.00.0.

CISA 156250600 — Official series illustration, not a photo of this exact size variant; consult model specifications.
Official series illustration, not a photo of this exact size variant; consult model specifications.Image source
156250600 backset 60 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.

Lock and fitting dimensions

Dimensions from model documentation
SpecificationsDimensions from model documentation
Backset60 mm
Faceplate width25 mm
Centre distance85 mm

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

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Specifications

Backset
60 mm
Faceplate width
25 mm
Centre distance
85 mm
Bolt/latch configuration
Nickel-plated steel latch and bolt
Bolt throws
3
Connection configuration
Central locking
Supplied strike
1.06271.00.0

Construction and operation of this version

156250600 is an explicit ordering row in the 56250 series with backset 60 mm. This model uses central locking, with matching strike 1.06271.00.0. Even with the same 60 mm backset, differences in additional-locking-point interfaces change compatible rods and the locking layout.

How to check installation dimensions

This model's backset is 60 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

  • Confirm additional extension rods and floor strikes separately for the actual assembly.
  • 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 347 / printed page 343

Manufacturer documents are provided in their original language.

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ZamokWiki · A source-backed reference library for locks

Manufacturer documents are provided in their original language.