CISA 57353 90 mm Backset Double-bit-key mortise lock with adjustable latch and bolt (157353900)

Lock and fitting dimensions

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

Specifications

Product series

57353

Backset

90 mm

Key system

Double-bit key

Body construction

Double-bit-key mortise lock with adjustable latch and bolt

Case height

78 mm

Faceplate width

25 mm

Case and faceplate finish

Galvanized

Bolt material

Nickel-plated steel

Bolt throw stages (original term Throws)

4

Handle-to-key-axis centre distance

67 mm

Latch function

Adjustable latch

Construction and dimensional compatibility

The fixed backset of 90 mm is measured horizontally from the door-edge faceplate to the key rotation axis; it is not the overall case depth. Case height 78 mm, faceplate width 25 mm, bolt-projection stages 4.

Double-bit-key construction differs from a euro-cylinder lock body; check the existing door's keyhole and operating components. This catalogue group does not list additional connecting rods as standard construction; a similar case does not establish that the interface is present.

Also check the installation space inside the door leaf, strike position and plates on both sides. An identical fixed backset does not make different constructions directly interchangeable.

Limitations

• The parameter diagram explains only the measurement reference; it is not a product outline and must not be used for drilling or installation.
• Strikes, extension rods and other accessories offered on request in the catalogue are not standard equipment.
• Statements of lock-series suitability or certification are not promises of current compliance for any complete door configuration.

Sources

Manufacturer documents are provided in their original language.

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