Bathroom Door Lock (Thumbturn) – Electro Brass (78mm Case / 57mm Backset)

A medium duty bathroom mortice lock designed for internal timber doors in domestic and commercial buildings.. The latch is operated by a standard door handle, while the deadbolt is locked and unlocked using a bathroom turn. with a 5mm spindle, giving reliable privacy for WC and bathroom doors. The longer 78mm case with 57mm backset is. ideal where a deeper lock position or additional handle clearance is required, and the electro brass finish offers. a clean, traditional look that complements classic door furniture.. Key Features. Medium duty bathroom lock for internal timber doors in homes, offices and commercial premises.. Latch operated by lever handle; deadbolt operated by separate bathroom turn (5mm spindle).. Medium duty spring – recommended for use with sprung door handles.. Tested and CE marked to BS EN 12209 for reliable performance and durability.. Certifire approved (CF5531) for use on 30 and 60 minute fire doors when fitted to a suitable door set.. 13mm deadbolt throw for positive engagement into the frame, improving privacy and security.. 78mm case depth with 57mm backset to follower – ideal for deeper lock mortices and doors with wider stile sections.. Reversible latch bolt for left- or right-handed doors.. Electro brass square faceplate and keep for a neat, traditional edge detail.. Corrosion rating Grade 1 – best suited to clean, dry, low-humidity internal environments.. Typical Applications. Bathroom and WC doors in domestic properties.. Staff and customer toilets in offices, shops and other commercial buildings.. En-suite and shower room doors where simple privacy locking is required.. Refurbishment or replacement of existing 78mm case bathroom locks.. Specifications. Lock type. Bathroom mortice lock (latch + deadbolt). Lock case depth. 78mm. Backset. 57mm (to follower/turn spindle). Centres. 57mm (handle spindle to turn spindle). Bolt throw. 13mm (approx.). Faceplate size (H × W). 152 × 22mm. Faceplate type. Square. Keep size (H × W). 125 × 24mm. Case height. 102mm. Case thickness. 14mm. Operation. Latch by handle; deadbolt by bathroom turn (5mm spindle). Finish. Electro brass. Corrosion rating. Grade 1 – clean, dry & low humidity environments. Fire rating. 30 & 60 minutes (when used on suitable fire doors). Standards & approvals. CE marked to BS EN 12209:2003, Certifire CF5531. Fixings. 4 × 4.0 × 25mm countersunk screws (recommended)