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Lockwood 25.4mm Mortice with Locking Adaptor

Lockwood 25.4mm Mortice with Locking Adaptor

Lockwood

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SKU:
STK 4782TSS
UPC:
9340116029771
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Lockwood 4782TSS — Universal Primary Lock 25.4 mm Backset with Locking Adaptor Satin Stainless

The Lockwood 4782TSS is a Selector® 4782 Series universal primary mortice lock supplied with a locking adaptor. With a 25.4 mm short backset and a Satin Stainless Steel (SS) finish, this lock is designed for aluminium and narrow stile doors in high-traffic commercial environments. Engineered as part of the Selector® MkII short backset platform, it provides reliable deadlatching, compatibility with SmartAir escutcheons, and compliance with fire door standards.

Delivery truck icon Estimated Warehouse Dispatch: 11 Days
Caution icon Non-Returnable Item: This product cannot be returned once purchased

Key features icon Key Features

  • Short backset: 25.4 mm for aluminium and narrow stile doors.
  • Locking adaptor included for expanded functionality.
  • Satin Stainless Steel finish for durability and architectural consistency.
  • Secure deadlatching bolt with auxiliary latch.
  • In-door configuration: red/green selector under faceplate.
  • Compatible with SmartAir escutcheons and electronic access systems.
  • Works with Lockwood 570 oval cylinders and restricted/master key systems.

Fire rating icon Fire Rated

  • Tested up to 4 hours on compliant fire door assemblies (AS 1905.1:2005).

Specifications icon Specifications

  • Item Code: 4782TSS
  • Function: Universal primary mortice lock with locking adaptor.
  • Backset: 25.4 mm (short backset).
  • Finish: Satin Stainless Steel (SS).
  • Door Thickness: 32–50 mm standard; kits available for thicker doors.
  • Bolt: 15 mm stainless steel latch with auxiliary deadlatch.
  • Case: Zinc alloy body with stainless steel chassis.
  • Handing: Reversible without case disassembly.
  • Standards: AS4145.2 (Durability D8, Security S7); AS1905.1 (Fire Doors).

Contents icon What's In The Box

  • 1 × Lockwood 4782TSS mortice lock body (25.4 mm backset, Satin Stainless Steel)
  • 1 × Satin Stainless Steel faceplate
  • 1 × Satin Stainless Steel strike plate
  • Locking adaptor (factory supplied)
  • Fixing screws
  • Installation instructions

Suitable uses icon Suitable Uses

  • Aluminium and narrow stile commercial doors.
  • Electronic access control projects using SmartAir escutcheons.
  • High-traffic commercial, retail, healthcare, and institutional facilities.
  • Fire-rated doors requiring a short backset mortice lock.

Product code list icon Selector® 4782 Short Backset Escape Locks — Item Code Family (25.4 mm Backset)

Item Code Function Description
4782 Escape Lock (Primary) Short backset mortice escape lock, 25.4 mm backset. Inside handle always free; outside handle rigid.
4782V Anti-vandal Escape Outside opened by handle when unlocked; outside key locks/unlocks and retracts latch; inside always free.
4782VT Anti-vandal + Turn Cylinder outside, turn inside; inside always free; outside key locks/unlocks and retracts latch.
4782X Key Entry Escape Outside opened by key at all times (handle rigid); inside handle always free.
4782XT Key Entry + Turn Outside opened by key at all times; inside by handle and turn; outside key locks outside handle.
4782-V Internal Cylinder Inside handle always free; inside key locks/unlocks outside handle and retracts latch after unlocking.
4782-T Internal Turn Inside handle always free; internal turn locks/unlocks outside handle.
4782XV Key Entry, Double Cylinder Outside key entry at all times; inside always free; inside key locks/unlocks outside handle and retracts latch.
4782TA Anti-lockout + Turn Prevents accidental lockout; inside turn; inside always free; outside handle operable when unlocked.
4782VTA Anti-lockout Anti-vandal + Turn Cylinder outside, turn inside; combines anti-vandal control with anti-lockout reset.

Accessories icon Selector® 4782 — Accessories & Spares (Short Backset, 25.4 mm Backset Series)

Item Code Description Notes
3782-FINKITCP / AC / AG / AU / AZ / BU / ORB / PB / SB / SBU Alternative Finish Kits Strike + faceplate + faceplate screws. Not suitable for 25.4 mm backset 4782 lock.
3782-TFKITSS / CP / PB Timber Door Fixing Kit Converts aluminium-fix short-backset case for timber doors (not suitable for 25.4 mm backset 4782).
3782-2100SS / 3782TF-2100SS ES2100 Electric Strike Faceplates Door position monitoring option with ES2100. TF plate suits timber fix; 3782-2100SS can be used directly with 3782SS primary.
3782-STK32XX / 3782-STK74XX Standard & Long Lip Strikes 32 mm lip (SS/CP/PB). 74 mm lip (SS only). XX = finish.
3782-FSTK32SS / 3782-FSTK64SS Fabricator Strikes Stainless “D” strikes for fabricator installations (32/64 mm lips).
3782-RFSTKCP / SC / PB Retrofit Strike Kits Replacement strike sets for existing installs; finish matched.
3782-STKBOX Strike Box (Pk=10) Box cavity behind strike for cleaner latch engagement.
5782-RK##SS / 5782-RK##CP / 5782-RK##PB Rebate Kits (30/38 mm backsets) For 13 mm rebated timber doors; specify handing (## = ACW/CW). Not for 25.4 mm backset 4782.
3782-SECKIT Security Faceplate Screw Kit TR20 tamper-resistant screws for strike/faceplate security.
SP3570-5018 / -5228 / -5238 / -5258 Extended Spindles Door thickness coverage approx. 32–200 mm (variant dependent).
SP3700/X7CAM X7 Cam (Latching) Retracts latch; interfaces with locking bar.
SP3700/VCAM V Cam (Locking) Locks/unlocks bar; retracts latch after unlocking.
3770M1-ADAPTOR Latching/Turn Adaptor (MkI) Required for short-backset (3780/4782/5782/6782) where an adaptor is specified.
3782-DXKITSC DX Mechanical Digital Kit Codepad + plate + spindle + adaptor (furniture ordered separately).
3782-DXKOKITSC DX Digital with Key Override Kit Includes lower cylinder provision; suits door thickness 43–46 mm.
3787-KIT570E Dual Entry Conversion Kit Lower cylinder plate + spindle cam + screws (two cylinders outside).

Warranty icon 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.

PDF icon Download PDF Resources

PDF icon Lockwood Selector 3700 Series Mortice Locks Catalogue
PDF icon Lockwood Selector 3700 Series Mortice Locks Service Manual
PDF icon Lockwood 25 Year Mechanical Warranty (Conditions Apply)

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