A heavy duty architectural pattern tubular latch designed for high-use internal doors in domestic and commercial environments. It features a heavy duty spring mechanism, allowing it to be used with sprung or unsprung door handles for added flexibility on site. With a 78mm case and 57mm backset, it suits many standard internal door setups where a robust, trade-grade latch is required. The Electro Brass / Satin Nickel finish combination is ideal when matching mixed ironmongery finishes. Key Features Heavy duty architectural tubular latch for high-use domestic and commercial internal doors. Heavy duty spring mechanism – suitable for use with sprung or unsprung door furniture. 78mm case with 57mm backset – a popular size for many internal door installations. Easily reversible latchbolt by turning the live latch/bolt – suitable for left or right hand doors. Fixings supplied to suit electro brass and satin nickel furniture. Bolt-through facility for lever handles with through-fixing screws. Complete with dust box and fixing screws. Suitable for 30 & 60 minute fire doors (when installed as part of a suitable tested door set). Corrosion rating 1 – recommended for clean, dry, low-humidity internal environments. Typical Applications High-traffic internal doors in offices, corridors and commercial premises. Domestic internal doors where a more robust, architectural pattern latch is preferred. New-build and fit-out projects requiring a heavy duty latch compatible with sprung or unsprung handles. Replacement of existing 78/57 architectural tubular latches. Specifications Latch type Heavy duty architectural tubular latch Product code 675815P Size 78mm case / 57mm backset Backset 57mm Lock case depth 78mm Lock case size (H × D) 22.5 × 78mm Lock case width 15mm Faceplate size (H × W) 60 × 25mm Faceplate type Square Keep size (H × W) 65 × 25mm Finish Electro Brass / Satin Nickel Material Steel Corrosion rating 1 – Clean, dry & low humidity environments Fire rating 30 & 60 minutes Standard BS EN 12209:2003 Recommended screw size 4.0 × 25mm (8 × 1") Supplied with Latch, dust box, fixing screws Pack type TIMbag Pack quantity 1 Each
