Lenlok S203 Single Cylinder Deadlock S203SC

Lenlok S203 Single Cylinder Deadlock Overview & Applications

Cheap hardware copies often bind against the strike plate or loosen at the mounting screws within months of installation. Fitting a genuine Lenlok S203 Single Cylinder Deadlock across solid-core timber and metal-framed entry doors across houses, apartments, heritage properties, and commercial shopfronts (28mm to 45mm thick) gives installers accurate Australian backset geometry, solid fixing points, and smooth daily operation. Direct 60mm backset retrofit for Lockwood 001/002 Deadlatches (Carbine Alpha CRD series), Lockwood 355/303 Deadlocks (Lenlok S205/S203/RJP), and Lockwood 100/201 Nightlatches.

Pair this item with matching hardware in our Deadlatches, Nightlatches & Anti-Jemmy Rim Deadlocks range or check our Commercial Cross-Brand Equivalency Schedule. On commercial, strata, or rental upgrades, always follow the Standards Australia AS 4145.2 Rim Lock & Deadlatch Security Standards.

Door Prep & Fitment: S203SC Surface Rim Deadlock

Before ordering replacement hardware, run a tape measure over your existing cutout. When checking S203SC surface rim deadlock on site, the S203SC is built around standard 60mm surface rim backset with a 32mm circular cylinder bore engineered to retrofit Lockwood 001, 100, 201, and 355 mounting footprints without redrilling. Matching your existing hole centres and backset lets you swap worn parts cleanly without patching timber.

3-Step Fitting Guide: 60mm Backset Timber Frame Retrofit

Follow these three practical steps for 60mm backset timber frame retrofit so the mechanism lines up cleanly on the first pass:

1. Confirm a 60mm horizontal backset from the door edge to the centre of the 32mm circular rim cylinder hole.
2. Mount the exterior C4 rim cylinder through the door, trim the connecting tailbar to match your door thickness (28mm to 45mm), and attach the rear mounting plate.
3. Secure the surface lock body and align the interlocking frame strike box with packing shims so the deadlatch plunger depresses cleanly.

Build Quality & Standards: 5-Pin C4 Brass Cylinder Keying

Lightweight variety-store hardware quickly suffers from bolt binding, surface pitting, or sticky internal springs under daily Australian use. The genuine S203SC features high-pressure diecast zinc lock body paired with an interlocking anti-jemmy frame strike or 19mm stainless steel deadlatching bolt tongue. Engineered around 5-Pin C4 brass cylinder keying, every internal spring and load-bearing surface is built to handle heavy daily foot traffic.

C4 Keying Options & Melbourne Warehouse Dispatch

For single-key convenience across your property, the S203SC is supplied with a genuine Australian C4 brass cylinder ready for in-house Keyed Alike pinning via SKU: KA. If you are ordering multiple compatible C4 cylinder locks and want them all pinned to one shared key before shipping, simply add our in-house Custom Keyed Alike Service (SKU: KA) to your cart.

Orders ship from our Melbourne, Victoria warehouse within 24 to 48 hours Australia-wide (free shipping over $149.95 AUD). Browse our Complete Hardware Catalogue or call (03) 9306 6760 or 0421 149 760.