The 3K74 range of High Security Mortice Sashlocks are probably the most well known and specified locks of their type in the British security market and are suitable for securing both domestic and commercial/industrial entrance doors. Offering excelent protection against all forms of common attack, this lock features a positive 20mm throw solid brass deadbolt with hardened steel anti-saw rollers, hardened steel anti-drill side plates and anti-pick levers. Certified to BS3621 and recommended by insurance companies and the police. This lock can be used for new applications or as a replacement for older locks and is approved for use on fire rated timber doors in accordance with current regulations. The heavy duty latch roller bolt is non handed and will suit left or right hand hung doors without modification. Originally bearing the Chubb name, this lock 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.
Can be fitted to double doors with rebated meeting stiles when used with the rebate conversion set in the Related Items section below.
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").
Certified to British Standard BS3621 : 2007 and successfully type tested for conformity to all of the requirements of BS EN 12209 : 2003 including the additional requirements for fire/smoke door use - certificates are available on request.
Fire rating is only applicable to this product when fitted to timber based door assemblies of proven fire resistance as defined in BS EN1634-1 or BS476 Part 22:1987 and when fitted with appropriate intumescent material.
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.