York British Standard 5 Lever Deadlocks

BS3621 5 Lever Mortice Deadlocks from York Security

A mortice deadlock has a key-operated bolt only, with no latch. It is typically fitted below a night latch on front doors, or on its own on doors that are kept locked. The York Security British Standard 5 lever deadlock from M.Marcus is kitemarked to BS3621, the level of security most UK insurers expect on external doors.

Deadlock and night latch together

For a traditional front door, pair a BS3621 deadlock with a York rim night latch. The night latch keeps the door closed day to day, and the deadlock is locked when you leave or at night.

Specification

BS3621 kitemarked 5 lever mechanism
Lengths: 2.5 inch and 3 inch
Supplied with fixing guide template and strike dust box
Pair with a matching keyhole escutcheon from the Heritage Brass range for a coordinated look
Rebate kits available to order for rebated doors

Browse the full M.Marcus locks and latches, compare mortice deadlocks from every brand, or match with Heritage Brass door furniture.

Related collections

Looking for something slightly different? Explore these related M.Marcus and York Security ranges:

BS3621 5 lever sash locks - insurance rated sash locks for external doors
BS3621 insurance rated mortice locks - sash locks and deadlocks together
York night latches - 40mm and 60mm rim night latches
3 lever mortice deadlocks - key-only locks for internal doors and stores

Why buy M.Marcus locks from Trade Door Handles?

Trade Door Handles is run by T.H. Wiggans Ironmongery, an independent ironmonger trading since 1976, with a trade counter team that has specified locks, latches and door furniture for joiners, builders and homeowners for decades. M.Marcus has manufactured door hardware in the West Midlands since 1940, holds ISO 9001:2015 quality accreditation and is a member of the Guild of Architectural Ironmongers and the Master Locksmiths Association. If you are unsure which lock body suits your door or handles, contact us before you order and we will check the backset, centres and finish for you.