3G135 Fortress Mortice Deadlock

The Union 3G135 Fortress mortice deadlock is part of the C-Series range of mortice locks. Originally made by Chubb, you may find these feature the distinctive Chubb mortice lock brand when replacing an old lock. This product is identical and just features the new Union branding.

These locks have a distinctive upright design and feature detainers, rather than levers. The 3G135 is the same size as a 3G110 but is higher security as it features a larger number of differs. While both locks offer a high level of security they do not meet the requirements of British Standard BS3621:2007.

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

The deadbolt on this lock throws 14mm and features hardened rollers to prevent saw attack.

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 security striking box in a grey finish.

Suitable for use on doors up to 50mm thick. The thickness of the door is determined by the length of the keys. If you require this lock to be fitted to a very thick door, we may be able to supply extra long keys. Please contact us for more details.

These locks are not handed and can be used on doors hinged on the left or right, which open inwards or outwards.

Supplied with 3 brass keys as standard. We can cut additional keys for this lock, just select whether you’d prefer genuine or copy key blanks and the quantity required from the associated products on this page.

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).