5573 Series – 127mm Backset Mortice Sliding Door Locks (Through Fixable)

This lock is part of the Lockwood Synergy® Series and is engineered for sliding timber or metal doors where a longer backset is required. The through-fixable design allows the lock to be securely fastened through the door to the external furniture, increasing strength and durability. The deadlock turn adaptor enables internal locking/unlocking via a turnknob, while the external side can be operated by key (when a cylinder is fitted).

Key Features

• Backset: 127mm – extended reach for specific door layouts or handle clearances

Function:

• Inside: Operated by turnknob (via deadlock turn adaptor)
• Outside: Operated by key (cylinder not included)
• Bolt: 19mm stainless steel deadbolt for secure engagement into strike
• Through-Fixable: Furniture can be fixed through the lock body for added strength
• Door Thickness Suitability: 32mm to 50mm (extended cylinders available for thicker doors)
• Reversible: Suits both left- and right-hand sliding doors without disassembly
• Construction: Heavy-duty brass and stainless steel components for long service life