Name: CISA Locking Line steel-armoured 121810800 straight-shackle padlock | clearance 37×17 mm
Brand: CISA

CISA 121810800 — 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

121810800 diagram of clear width 37 mm, clear height 17 mm and shackle diameter 12 mm — This site's clearance and bar-diameter explanation is drawn from the catalogue; the dashed box indicates clearance directions, not the padlock outline. Manufacturer appearance and dimension drawings can be viewed in the PDF.

Padlock and shackle dimensions

Dimensions from model documentation
Specifications	Dimensions from model documentation
Body width A	77 mm
Shackle clear width C	37 mm
Shackle diameter D	12 mm
Shackle clear height L	17 mm
Body thickness S	29.2 mm

Compare the shackle diameter, inside width and length with the hasp openings. Check clearance for opening.

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Specifications

Series / key system: Locking Line steel-armoured
Construction: Straight-shackle padlock
Body width A: 77 mm
Shackle clear width C: 37 mm
Shackle diameter D: 12 mm
Shackle clear height L: 17 mm
Body thickness S: 29.2 mm
Lock body material: Solid brass with nickel-plated hardened-steel armour
Shackle material: Nickel-plated hardened steel
Catalogue pin count: 5
Cylinder protection plate: Carbonitrided steel (listed in the catalogue only for this model)

Clearance and hasp compatibility

This model has shackle clearance C=37 mm, L=17 mm, and shackle diameter D=12 mm; Body width A=77 mm, thickness S=29.2 mm.

C and L are the two clearance directions of the recess beneath the straight shackle. When checking the hasp, also verify whether the straight shackle can pass through its opening and whether there is enough clearance around the lock body; do not select solely by external body width.

Keys, materials and construction scope

This series has a brass body with external hardened-steel armour, differing from a solid-steel body. Shackle passes transversely through the recess; check both recess clearance and shackle diameter when selecting.

Limitations

Catalogue dimensions are for preliminary selection; Product outline, opening clearance and supplied configuration follow the manufacturer's instructions for the corresponding model.
The original diagram explains only the three measurement directions C, L and D; it does not show the actual lock-body outline, scale or protection grade.

Sources

CISA English catalogue, PDF page 152 / printed page 148

Manufacturer documents are provided in their original language.

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