Mortice Locks

The TSS 3 lever mortice deadlock is perfectly suited for use on internal wooden doors. It provides a standard level of security at an extremely affordable price.

Featuring one of the smallest lock cases on the market, this lock is ideally suited for retro fit applications on wooden doors.

In line with a number of other mortice locks, these locks feature a black lock case but they have unique measurements that identify them from other mortice locks. Please refer to the line drawing for details.

This mortice lock is available in either Polished Brass or Polished Chrome finishes in boxes or in clam packs for retail display.

The 3 lever range from TSS includes a deadlock, sash lock and bathroom lock to provide a complete, interior door solution.

The deadbolt throws 11mm. If additional protection is required against attack by sawing, we’d recommend a 5 lever version with attack prevention features.

The deadbolt can be locked and unlocked from either side by use of the key.

This lock is supplied with 2 key hole escutcheons, in a matching finish to the lock for both the internal and external sides of the door. It also comes with a striking box in a finish which matches the lock.

Suitable for use on most internal wooden doors. These locks are not handed and can be used on doors hinged on the left or right, which open inwards or outwards.

Should you require more than one lock to work on the same set of keys, these locks can be keyed alike by our inhouse locksmith team. We can typically dispatch the same day (larger quantities may require longer).

These locks are not suitable for use on a fire door.

Trade Security Supplies believe that quality doesn’t have to come with the price tag. That’s why they provide high-quality locks & ironmongery products that meet specification requirements at an affordable price.

TSS products are high quality, without the high price and offer features that aren’t available on competitor products.

The TSS product range suits a range of applications for domestic, commercial and industrial specifications.

2 Lever mortice deadlocks are commonly fitted to internal wooden doors. They are locked from both the inside and outside with the key which throws the deadbolt. Mortice lever locks (sometimes called mortise locks) are commonly fitted to wooden doors but can also be found used in steel, aluminium, and composite doors. They are locked from both the inside and outside with the key which throws the deadbolt. By definition, a mortice lock is fitted (“morticed”) within the door, rather than being fitted to the face or surface of it.

There are multiple types of lever lock in use in the UK. Dead locks (mortice dead locks) are operated by a key only whereas sash locks (mortice sash locks) feature a dead bolt and a latch which is operated by a handle (often a lever handle). Both lever locks with throw the dead bolt into a strike plate. The strike plate on sash locks also accepts the sprung loaded reversible latch.

Lever mortice deadlocks can be used for fitting to front or back doors and to internal doors and external doors, but we’d always recommend fitting a British Standard BS3621 product to external doors for maximum security. You should also check with the houseowner’s insurer’s requirements on both residential properties and commercial properties. You may find lever locks fitted to commercial properties but cylinder lock cases operated by a cylinder or pin tumbler lock are more common mortice locks fitted in commercial environments.

Lever mortice door locks are commonly used for internal doors too. These tend to be 3 lever mortice locks where the requirements for security and burglary prevention are lower.

When replacing an existing lever mortice lock, you may find that your replacement mortice lock is larger than the one that you are replacing. This may be because you are improving security, such as upgrading to a lock with thicker, anti-drill hard steel plates or because the forend length, forend width or the design of the lock has changed. The hole for the lock can normally be made larger with a hammer and chisel. This can also be the case for strikes, which may have changed design.

Please always ensure that your door is sufficiently thick to accommodate the mortice lock that you are fitting. The Master Locksmith Association recommend a minimum thickness of 44mm.

A lever mortice lock prevents a door from opening by throwing a bolt from the lock into a metal keep or strike, fitted to the frame. Once the bolt is engaged in the keep, a hinged door is prevented from being opened. A mortice lock bolt is locked or unlocked from either the inside or outside by a key. Inside the lock, there is space for the bolt to be retracted. If the cuts in the key match the levers inside the lock, the user will be able to turn the key to throw (to lock) or withdraw (to unlock) the bolt. If the wrong key is used, the levers will not line up and the lock will not operate.