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Astra handing definition - Which side of the door is the outside?

What do the Astra lock product codes mean?

ASTRA LOCK B423-000 SC

Product Code: 05160039

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Description

Astra MB-Series short backset, brass body vestibule key-snibbing (classroom) mortice lock.

  • Backset: 25.5 mm.
  • Bolt projection: 14 mm.
  • Metal door fixing.
  • Re-handable.
  • No cylinders.
  • No escutcheons.
  • No turnsnib.

notes-icon Ascot/Rondo plates
Escutcheon not required when using Ascot/Rondo plates.

Vestibule function

  • Mini bolt deadlatching
  • Inside and outside lever retracts latchbolt except when outside lever is locked by cylinders or turnsnib.
  • Inside lever is always free.

Supplied body only in satin chrome.

Technical Specifications
Brand ASTRA
Finish Satin Chrome
Lock Pitch In mm 90.25
Backset 25.5 mm
Handing Reverisble
Lockbody Has Turnsnib Hub Yes
Turnsnib Hub Spindle Type 4.5mm Square

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