Probably one of the best locks of it's type ever made, the 3K70 is a High Security Mortice Lock that has been a popular choice for domestic and industrial/commercial entrance doors for nearly a century. Incorporating the famous Chubb 5 Detainer mechanism the lock has excellent protection against all common forms of attack including a positive throw solid brass deadbolt with hardened steel anti-saw rollers and hardened steel anti-drill plates. Originally bearing the Chubb name, it is now manufactured under the Union brand name. Produced in the same factory by the same people and using the same technology and parts, this lock remains "Chubb at Heart"..
This lock is standard sprung and requires lever handles with integral springing in the rose or backplate. To avoid fixing screws fouling the lock body use handles with backplates where fixings positions are adequately spaced. NOT recommended for use with door knobs.
Care should be taken in selecting the correct hand when ordering. Please refer to the relevant image above.
Conversion sets to allow fitting of this lock to double doors with rebated meeting stiles are available to special order - please contact us for details and prices
Detailed advice on the selection of mortice locks and latches can be found in our [Mortice Locks & Latches Specification Guide].
For best results and long life, this lock should be lubricated with a light machine oil at least once a year.
This lock is supplied "to differ" whereby each lock is operated by it's own individual keys. Please contact us for details and prices for this lock to be supplied in groups operated by the same key ("to pass" or "keyed alike").
One lock complete with 2 keys, faceplate, frame keeper plate and all fixing screws.
This lock is normally available from stock. If we are temporarily out of stock you should allow 3 - 5 working days for despatch.