Lockwood Selector® 3777 Dual Entry Mortice Locks

Lockwood Selector® 3777 Dual Entry Mortice Locks
Lockwood Selector® 3777 Dual Entry Mortice Locks
Lockwood Selector® 3777 Dual Entry Mortice Locks
Lockwood Selector® 3777 Dual Entry Mortice Locks

A comprehensive range of cylinder mortice locks suitable for heavy duty use in industrial and commercial buildings, institutions, clubs, schools, hospitals, hotels and similar buildings.

Designed to enable third parties such as emergency services to enter specific areas by second cylinder; without giving access to all locksets in the building and the ability to lockout keys with restricted access at certain times.

Features and Benefits

  • Easy red/green function setting
  • All lock settings are made from under the faceplate allowing for simple in-door configuration
  • Standard primary locks include anti-lockout and holdback capabilities
  • Improved cylinder functions including lock/unlock and retract latch as standard
  • Reduced range of cylinder cams and turn adaptors relative to other commonly available commercial cylinder mortice locks


Select from Lockwood 1800, 2800 or Artefact Series II ranges.

Lockwood Plate Door Handles – More information

Case and Faceplates

  • High purity zinc alloy material cases with stainless steel chassis plates. Stainless steel faceplates provided as standard
  • Brass faceplates available for alternative finishes


  • 60mm standard backset
  • Extended backsets 89 and 127mm are available

Latch Bolts

  • Latch bolts are made with stainless steel, 15mm in size
  • Deadlatching is achieved by an auxiliary stainless steel latch bolt
  • Reversible for both left and right hand doors, opening in or opening out whilst lock is in door
  • Electric Strike compatibility
  • Separate auxiliary bolt moves into lock case simultaneously with latch bolt
  • Radius bolt provides greater deadlatch throw and smoother closing action

Cylinder Retaining Pin

Hard-drawn spring steel wire, corrosion protected.

Door Thickness

  • 32 to 50mm
  • Components to facilitate use on thicker doors are available on application

Door Clearance

To ensure correct functioning of the deadlatching mechanism and security for all locks, the clearance between the door and the frame should be 3mm. The deadlatching will operate up to 7mm door clearance, however door clearances over 5mm are not recommended.

Aluminium Doors

Specify Selector® 3772-AFKIT for aluminium door fixing kit to convert a timber fix lock to aluminium fixing. The aluminium door fixing kit comes with a 156mm by 25mm radius faceplate common to other aluminium door locks.


All Selector® 3770 Series Cylinder Mortice Locks conform with Level S7 (Physical Security) Australian Lock Standard (AS-4145.2-2008). Conforms to Level S8 (Physical Security) when fitted with door furniture and anti-drill cylinder.


All Selector® 3770 Series Cylinder Mortice Locks conform with Level D8 (Durability) Australian Lock Standard (AS4145.2-2008).

Fire Rating

All Selector® 3770 Series Cylinder Mortice Locks have been successfully tested up to 4 hours (depending on type of doorsets) on fire door assemblies in accordance with Australian Standard AS 1905.1-2015, Part 1: Fire Resistant Doorsets.


All Selector® 3770 Series Cylinder Mortice Locks conform with Level C6 (168 hours) Australian Standard (AS4145.2-2008).


Requires standard Lockwood oval shaped brass cylinders and brass barrels. Lockwood cylinders include bump resistant five pin tumbler mechanism.

Functions require the use of different cams and adaptors.

Dual cylinder entry is achieved with standard primary lock plus dual entry kit.  Dual entry kits available to suit lower cylinder mounting of 570E type cylinders (3777-KIT570E) or 577 cylinders (3777-KIT577). Cylinders must be ordered separately.


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 and can also include specially designed keying systems such as master key systems. This allows for different levels of mechanical access control.

Lockwood Keying Platforms – More information

Standard Finishes

Stainless Steel SS

Extended Cylinders

Modular Cylinder Extensions are available for thicker doors.


Rebate kits to suit 13mm standard rebate are available.

Electric Strikes

Lockwood offers a wide range of electric strikes which are compatible with the Selector® 3770 series mortice lock.

Lockwood Electric Strikes – More information


Part Number 3777 4777 5777
Dimension A 60 89 127
Dimension B 88 117 155
Part Numbers

Lockwood Selector 3777 Dual Entry Mortice Locks


Primary Locks

Description Part Number
3772 Universal Primary Lock 60mm Backset 3772SS
4772 Universal Primary Lock 89mm Backset 4772SS
5772 Universal Primary Lock 127mm Backset 5772SS


Conversion Kits

Description Part Number
Dual Entry Kit To Suit 570E Type Cylinder 3777-KIT
Dual Entry Kit To Suit 577 Type Cylinder 3777-KIT

Australian Made

Designed and built in Australia according to high quality standards.

Where to buy?

Find your local Lockwood stockist.

Disclaimer: Selector is a registered trademark of ASSA ABLOY Australia Pty Ltd in New Zealand