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Astra Mortice Locks

Frequently Asked Questions

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

What do the Astra lock product codes mean?

ASTRA LOCK MB421-000 SC

Product Code: 05160012

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This product is a special order (BTO) and is not returnable.
Description

Astra MB-Series short backset, brass body vestibule mortice lock.

  • Backset: 25.5 mm.
  • Bolt projection: 14 mm.
  • Metal door fixing.
  • Non handed. Except in double cylinder function.
  • 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 inside cylinders or turnsnib.
  • Inside lever/knob is always free.
  • Outside cylinder retracts latchbolt.

Supplied body only in satin chrome.

Astra MB-Series short backset, brass body vestibule mortice lock.

  • Backset: 25.5 mm.
  • Bolt projection: 14 mm.
  • Metal door fixing.
  • Non handed. Except in double cylinder function.
  • 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 inside cylinders or turnsnib.
  • Inside lever/knob is always free.
  • Outside cylinder retracts latchbolt.

Supplied body only in satin chrome.

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

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