Lockwood Synergy® 3540 Short Backset Mortice Deadlock

Lockwood Synergy® 3540 Short Backset Mortice Deadlock
Lockwood Synergy® 3540 Short Backset Mortice Deadlock

Short backset, swing bolt deadlocks suitable for narrow stile hinged doors.

Positive action deadbolt locked or unlocked by either key, turnknob, escape turn or handle. Suitable for sliding doors where lock can be mounted to door jamb and deadbolt engages strike mounted to face of door.

Suitable for heavy duty use in industrial and commercial buildings, institutions, clubs, schools, hospitals, hotels, retail and similar buildings.

All 3540 Series Cylinder Mortice Locks are built of the finest materials, with the easy action and solid feel of the world's finest locks.



  • High quality zinc alloy case
  • Brass turnknobs and cylinder escutcheons
  • Zinc die cast levers


Sintered stainless steel.

Door Thickness

Suits hollow stile door sections with 28mm internal thickness and 58mm maximum external thickness.

Timber Doors: 32 to 58mm.


  • 5 pin tumbler mechanism
  • Brass cylinders and brass barrels


Standard Keying

  • Supplied individually keyed with two keys per lock
  • 78,000 key combinations
  • Key blank KB2015P

Restricted Special Keying

Lockwood locks can be keyed to a number of controlled and/or specially keyed systems. These range from legally protected keys to protect against unauthorised duplication, which can also include specially designed key systems such as master key systems, which allow for different levels of mechanical access control.

Lockwood Keying Platforms - more information

Standard Finish

  • Satin Chrome Brushed SC
  • Other finishes available on application.

Where to buy?

Find your local Lockwood stockist.