Name: CISA AP4 S 55/30 double cylinder with adjustable knob shaft (10P3S792012)
Brand: CISA

CISA 10P3S792012 — 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

10P3S792012 dimension diagram: side B 29.5 mm, side A 54.5 mm, overall body length 84 mm — Our dimension diagram follows the corresponding catalogue row; it is not a product view or machining template; the projecting knob shaft is excluded from body dimension L.

Cylinder dimensions

Dimensions from model documentation
Specifications	Dimensions from model documentation
Dimension A	54.5 mm
Dimension B	29.5 mm
Overall length L	84 mm

Measure both sides from the fixing screw. Check the cylinder profile, cam and version.

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Specifications

Key system: AP4 S
Construction: Double cylinder with adjustable knob shaft
Nominal size: 55/30
Dimension A: 54.5 mm
Dimension B: 29.5 mm
Overall length L: 84 mm
Coding construction: Ordering-table pin-position count: 12
Body construction: Brass body with a dual-material anti-snap reinforcing core
Key type: Reversible nickel-silver flat key with a moving element
Operating mechanism: Knob-shaft operation
Catalogue key part number: 1.00810.00.0

Operation and dimensions of this version

The knob shaft illustrated for 10P3S792012 is on side B; Body B=29.5 mm, key side A=54.5 mm; L=84 mm excludes the projecting knob shaft. The knob is an operating component to verify separately; a shaft configuration does not mean that a complete knob is supplied. This section explicitly requires use with inside escutcheon 1.06458.20; the knob-shaft configuration is adjustable; the tabulated A and B dimensions cannot be arbitrarily extended or shortened.

Key system and installation checks

AP4 S key part number is 1.00810.00.0; it has a long neck to accommodate protective escutcheons. The series includes carbonitrided-steel pins and differently shaped driving pins; Security Card is used for protected key duplication; it does not establish compatibility between different systems.

When selecting, first record nominal size 55/30 for 10P3S792012, then verify the actual 54.5+29.5=84 mm against the drawing. Nominal size is an ordering identifier; adding its two integers does not give the actual overall length.

Limitations

Dimensions are divided at the central reference in the catalogue drawing; a and B do not automatically designate the outside and inside of the door. Installation also requires checking the lock-body cam interface, door thickness and escutcheon thickness.
Catalogue model numbers and dimensions do not establish current stock availability or certification of the complete door; Before purchase, check the actual supplied product's identification plate and the manufacturer's installation documentation.
The catalogue lists series 06353, 06355, 06356 and 06357 knobs as available on request, not as standard equipment for this row.

Sources

CISA 2026 English catalogue, PDF page 75 / printed page 71

Manufacturer documents are provided in their original language.

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