Name: CISA RS5 40/10 half cylinder (10R3M403012)
Brand: CISA

CISA 10R3M403012 — 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

10R3M403012 dimension diagram: side B 10 mm, side A 39.5 mm, overall body length 49.5 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.

Product dimensions

Dimensions from model documentation
Specifications	Dimensions from model documentation
Dimension A	39.5 mm
Dimension B	10 mm
Overall length L	49.5 mm

Compare the overall dimensions and mounting points with the documentation for the specific product.

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Specifications

Key system: RS5
Construction: Half cylinder
Nominal size: 40/10
Dimension A: 39.5 mm
Dimension B: 10 mm
Overall length L: 49.5 mm
Coding construction: 16 active pins in 5 rows, plus bilateral control pins
Body construction: Modular brass body with zinc-alloy extension connectors
Key type: Reversible nickel-silver flat key with a moving element
Operating mechanism: Cam adjustable to 8 positions
Catalogue key part number: 1.00820.00.0
Pin-position column in the ordering table: 18 (technical description separately specifies 16 active pins and bilateral control pins)
Body assembly: Explicitly modular in the catalogue

Operation and dimensions of this version

10R3M403012 has key operation on one side only, A=39.5 mm, with the other section B=10 mm; Nominal size 40/10 must not be interpreted as a double cylinder accepting keys on both sides. The cam adjusts to 8 positions; check the starting angle and lock-body drive requirements when matching components. This row is explicitly identified as modular in the catalogue; for extensions or repairs, check the corresponding connectors; modules from other series cannot simply be substituted.

Key system and installation checks

The catalogue key part number for RS5 is 1.00820.00.0, with blade length 16 mm. The body is modular; pins and protective inserts are carbonitrided steel; Changes to assembled length must still follow the manufacturer's module-matching requirements.

When selecting, first record nominal size 40/10 for 10R3M403012, then verify the actual 39.5+10=49.5 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.

Sources

CISA 2026 English catalogue, PDF page 64 / printed page 60

Manufacturer documents are provided in their original language.

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