Horizontal Mortice Bathroom Lock - For Use With Door Knobs - 127mm or 152mm Deep Case - Polished Brass PVD Plated

Catalogue Number:
Full Description
Product Name Price Qty
20180.1 - Horizontal Mortice Bathroom Lock - Polished Brass PVD Plated - 127mm Case Depth - (101mm Backset)
£34.37 £28.64

Per Each
20180.2 - Horizontal Mortice Bathroom Lock - Polished Brass PVD Plated - 152mm Case Depth - (127mm Backset)
£34.37 £28.64

Per Each
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  • Horizontal mortice bathroom lock with 5mm spindle for use with bathroom turn & release systems.
  • Supplied with PVD brass forend and strike plates.
  • Large style lock case available in two sizes - 127mm (5 inches) or 152mm (6 inches) deep.
  • Traditional horizontal style is ideal for mortice knobs as it places the knobs far away from the door frame.
  • Horizontal locks were a traditional lock often found in period properties.
  • Spindle hole for the turn & release is located to the side of door knobs rather than underneath.
  • Thumbturn operated dead bolt.
  • Bolt through lock (38mm bolt holes) to suit bolt together handles and mortice knobs.


  • Latch is withdrawn via a mortice door knob or lever handle from either side of the door (handles sold separately).
  • Two way action allows un-sprung door knobs to be turned either way to withdraw the latch mechanism and open the door.
  • Deadbolt is locked and un-locked via a bathroom thumbturn and release lock (sold separately).


  • Light weight springing makes this lock ideal for use with door knobs.
  • Two way action allows door knobs to be turned in both directions.
  • Solid brass guided latch.
  • Solid brass deadbolt with anti-saw rollers.
  • Bolt through facility for bolt together fixing lever handles and accessories at 38mm centres.
  • 8mm x 8mm spindle follower (to suit standard UK size spindles).
  • Latch can be reversed on site without taking the lock case apart.
  • Reversible frame mounted strike plate.


Security Level 

  • Low security architectural range.
  • Suitable for use on internal doors in residential or light commercial buildings.


  • PVD brass.


Alternative Finishes Available

  • Polished stainless steel.
  • Satin stainless steel.


Diagram and dimensions of Union horizontal mortice bathroom lock

Available in two sizes

  • 20180.1 - 127mm (5 inch)
  • 20180.2 - 152mm (6 inch)
Dimension On Diagram
Overall Case Depth
Backset (Distance To centre Of Spindle Hole)
Backset (Distance To centre Of Key Hole)
Case Height
Forend - Height x Width
120mm x 25mm
120mm x 25mm

Options Available To Order

  • Intumescent sheets and lock case liners are available. Please see our intumescent fire rated products category for details.

Rebate Kit For Double Rebated Doors

  • 40832.1 - 13mm PVD brass rebate kit for use with the horizontal mortice locks.

Unit Of Sale

  • Each - (1 x lock case supplied with forend, strike plate).
More Information
Item 20180
Item Code 20180
Finish Polished Brass PVD Plated
Dimensions 127mm or 152mm Deep Case
Sold Per Each
Availability Stock item - please allow 1-3 days for delivery
Stock item - please allow 1-3 days for delivery
Download PDF Data Sheet
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