Yale B-85 Deadlocking Nightlatch

The Yale B‑85‑DMG‑PB‑40 delivers robust security and effortless operation tailored for UK homes and commercial properties. Finished in elegant dark metallic grey with a polished brass cylinder, this rim‑mounted nightlatch offers automatic deadlocking when the door closes, plus an internal snib control for added flexibility. Supplied with two keys, it suits inward‑opening timber, composite, or steel doors up to 57 mm thick. Its sleek styling, reliable Yale engineering, and straightforward installation make it a smart choice for improved door security on either left‑ or right‑hand hinges.

Why Must You Buy the Yale Deadlocking Nightlatch?

Engineered by Yale, a leading name in UK lock hardware, the B‑85 provides reliable deadlocking, automatically securing the bolt when the door shuts. The lever handle inside can be locked down with a reverse key turn externally or using the built‑in snib for hold‑back or deadlock. Perfect for narrow‑style doors thanks to its 40 mm backset, it supports both left and right-handed inward‑opening configurations and works with doors up to 57 mm thick.

Standout Features and Benefits Include

• High‑security deadlocking latch automatically locks when the door closes.
• Snib hold‑back or deadlock function for flexible internal control.
• Elegant dark metallic grey case with polished brass cylinder.
• Supplied with two keys for immediate use.
• Compact 40 mm backset fits narrow‑profile doors.
• Compatible with left‑ or right‑handed inward‑opening doors up to 57 mm thick.
• Simple surface‑mounted rim installation, no morticing required.

Versatility in Applications

• Residential front and back doors require an automatic deadlock
• Rental properties or holiday lets need secure but convenient access
• Office and retail entrances with inward‑swing doors
• Refurbishment and retrofit projects on existing timber or composite frames
• Secondary or side entrances where quick lock installation is preferred
• Internal corridors or utility doors where controlled access is necessary

For more information please check the datasheets.