QS6055/5 Stainless Steel Bathroom Mortice Lock | 55mm Backset

QS6055/5 Stainless Steel Bathroom Mortice Lock The QS6055/5 is a heavy-duty stainless steel bathroom mortice lock combining a latch bolt and deadbolt in a single body. Designed for timber doors in South African residential and commercial bathrooms, it operates via a WC thumbturn mechanism — providing reliable privacy locking without a key. With a 55mm backset and 60mm centre-to-centre (CTC) distance, this lock is compatible with standard South African door hardware and pairs seamlessly with WC lever or knob sets. Key Specifications Type: Bathroom mortice latch lock and deadbolt (WC) Material: Stainless steel Backset: 55mm Centre (CTC): 60mm Forend size: 24mm × 170mm Lock body size: 80mm × 127mm Application: Timber doors Includes: Striker plate Why Choose the QS6055/5? Stainless steel construction resists corrosion — ideal for humid bathroom environments Combined latch and deadbolt in one body for simplified installation WC thumbturn operation — no key required for privacy locking Designed for standard South African timber door frames Striker plate included for a complete installation Frequently Asked Questions What is the backset of the QS6055/5? The backset is 55mm — measured from the edge of the door to the centre of the keyhole/spindle. What does WC mean on a bathroom lock? WC stands for Water Closet. A WC lock uses a thumbturn on the inside to engage the deadbolt, providing privacy without requiring a key. It is the standard configuration for bathroom and toilet doors in South Africa. Is this lock suitable for my timber door? Yes. The QS6055/5 is specifically designed for timber doors and includes a striker plate for a complete, ready-to-install solution. What is the CTC distance and why does it matter? CTC (centre-to-centre) is the distance between the latch spindle and the keyhole/thumbturn spindle — in this case 60mm. This must match your door handle set to ensure correct alignment. Can I use this lock with any WC lever handle set? Yes, provided the handle set has a matching 60mm CTC and 55mm backset. Always verify compatibility with your chosen handle set before ordering. What is the lead time for this product? Typically 3–4 days from order confirmation. Nationwide delivery available across South Africa. Is the QS6055/5 suitable for commercial bathrooms? Yes. The stainless steel construction and robust lock body make it suitable for both residential and light commercial bathroom applications. Does this lock come with a striker plate? Yes, a striker plate is included in the box.