Lockwood 5782SS — MkII Universal Primary Lock 30 mm Backset Satin Stainless
The Lockwood 5782SS is a Selector® 5782 MkII universal primary mortice lock with a 30 mm short backset, finished in Satin Stainless Steel (SS). This heavy-duty lock is purpose-designed for aluminium and narrow stile commercial doors, delivering robust deadlatching performance, fire-rated compliance, and long service life in high-traffic institutional and commercial environments.

Key Features
- 30 mm short backset mortice lock designed for aluminium and narrow stile doors.
- Satin Stainless Steel finish for durability and architectural appeal.
- Secure deadlatching bolt with auxiliary latch for enhanced protection.
- In-door function selector (red/green switch) under the faceplate for easy configuration.
- Compatible with Lockwood 570 oval cylinders and restricted/master key systems.
- Reversible handing without disassembly for quick onsite setup.
Fire Rated
- Tested up to 4 hours on compliant fire door assemblies (AS 1905.1:2005).
Specifications
- Item Code: 5782SS
- Function: Universal primary mortice lock body (MkII platform).
- Backset: 30 mm (short backset).
- Finish: Satin Stainless Steel (SS).
- Door Thickness: 32–50 mm standard; extension kits available for 75–200 mm.
- Bolt: 15 mm stainless steel latch with auxiliary deadlatch.
- Case: Zinc alloy with stainless steel chassis.
- Handing: Reversible without case disassembly.
- Compliance: AS4145.2 (Durability D8, Security S7); AS1905.1 (Fire Doors).
What's In The Box
- 1 × Lockwood 5782SS mortice lock body (30 mm backset)
- 1 × Satin Stainless Steel faceplate
- 1 × Satin Stainless Steel strike plate
- Fixing screws
- Installation instructions
Suitable Uses
- Aluminium and narrow stile commercial doors requiring short 30 mm backset locks.
- High-traffic environments such as offices, hospitals, schools, and retail premises.
- Fire-rated doors requiring compliant mortice locks.
- Retrofit upgrades from earlier short backset Synergy® locks to Selector® MkII platform.
Selector® 5782 Short Backset Escape Locks — Item Code Family (30 mm Backset)
Selector® 5782 — Accessories & Spares (Short Backset Platform, 30 mm Backset)
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Warranty
- Lockwood 25 Year Mechanical Warranty covers mechanical components and workmanship under normal use and correct installation.
- Electronic and electrical components are covered for 3 years (PADDE & electric mortice locks 5 years, batteries excluded).
- Keys are covered for 12 months.
- Finish warranty varies by finish type and exposure — e.g. Everbrass 25 years; Stainless/Chrome/Anodised 10 years; PVD/VIVID 10 years; Symmetry range 5 years; decorative finishes such as bronze, antique and powdercoat 2 years (natural brass ageing excluded).
- Warranty excludes misuse, improper installation, modification, or failure to maintain as specified.
Download PDF Resources
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Lockwood Selector 3700 Series Mortice Locks Catalogue |
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Lockwood Selector 3700 Series Mortice Locks Service Manual |
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Lockwood 25 Year Mechanical Warranty (Conditions Apply) |