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Lockwood Heavy Duty Mortice with Hub Spring 8 mm Backset Hub - 89 mm Backset

Lockwood Heavy Duty Mortice with Hub Spring 8 mm Backset Hub - 89 mm Backset

Lockwood

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SKU:
STK 4772NSF8SS
UPC:
9340116015255
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Lockwood 4772NSF8SS — MkII Universal Primary Lock, Heavy Duty Hub Spring, 8 mm Hub, 89 mm Backset Satin Stainless

The Lockwood 4772NSF8SS is a Selector® 4772 MkII universal primary mortice lock featuring a heavy-duty hub spring, 8 mm hub and a 89 mm backset. Finished in Satin Stainless Steel (SS), it is engineered for high-traffic commercial and institutional environments where durability and long service life are essential. Designed as part of the MkII platform, this lock includes enhanced function configuration, fire-rated compliance, and compatibility with Lockwood furniture and cylinders.

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

  • Universal mortice lock body — MkII Selector® platform.
  • 89 mm backset for applications requiring extended clearance.
  • 8 mm hub and heavy-duty hub spring for increased durability.
  • Satin Stainless Steel faceplate with square ends.
  • Compatible with Lockwood 570 oval cylinders, restricted and master key systems.
  • Designed for high-traffic commercial and institutional doors.
  • In-door configuration with red/green selector under faceplate for simple adjustment.

Fire rating icon Fire Rated

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

Specifications icon Specifications

  • Item Code: 4772NSF8SS
  • Function: Universal primary mortice lock body (MkII, 8 mm hub).
  • Backset: 89 mm.
  • Hub: 8 mm with heavy-duty spring.
  • Finish: Satin Stainless Steel (SS).
  • Door Thickness: 32–50 mm standard; extension kits available up to 200 mm.
  • 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 4772NSF8SS mortice lock body (89 mm backset, 8 mm hub)
  • 1 × Satin Stainless Steel faceplate
  • 1 × Satin Stainless Steel strike plate
  • Fixing screws
  • Installation instructions

Suitable uses icon Suitable Uses

  • Heavy-duty commercial doors requiring an 89 mm backset.
  • High-traffic institutional facilities including schools, hospitals, and government buildings.
  • Fire-rated escape doors requiring certified mortice lock hardware.
  • Applications needing 8 mm hub with heavy-duty spring for enhanced longevity.

Product code list icon Selector® 4772 MkII Escape Locks — Item Code Family (89 mm Backset)

Item Code Function Description
4772 Escape Lock (Primary) Base mortice escape lock, 89 mm backset. Inside handle always free; outside handle rigid.
4772V Anti-vandal Escape Lock Outside opened by key when unlocked; inside handle always free.
4772VT Anti-vandal + Turn Cylinder outside, turn inside; inside handle always free.
4772X Key Entry Escape Outside opened by key at all times; inside handle always free.
4772XT Key Entry + Turn Outside opened by key; inside by turn/handle. Inside handle always free.
4772-V Internal Cylinder Inside handle always free; inside key locks/unlocks outside handle.
4772-T Internal Turn Inside handle always free; turn locks/unlocks outside handle.
4772VV Anti-vandal, Double Cylinder Outside key locks/unlocks outside handle; inside cylinder also operates bolt.
4772XV Key Entry, Double Cylinder Outside key entry at all times; inside handle always free; inside key controls outside handle.
4772-TA Anti-lockout + Turn Prevents accidental lockout; inside turn; inside handle always free.
4772VTA Anti-lockout Anti-vandal + Turn Cylinder outside, turn inside; combines anti-vandal & anti-lockout.
4772V-H Holdback Anti-vandal Latch can be held in; outside key locks/unlocks; inside always free. Not fire-door rated.
4772XVH Holdback Key Entry, Double Cylinder Double cylinder; holdback function; inside always free. Not fire-door rated.
4772VTH Holdback Anti-vandal + Turn Cylinder outside, turn inside; holdback enabled. Not fire-door rated.

Accessories icon Selector® 4772 MkII — Accessories & Spares

Item Code Description Notes
3772-FINKITCP / PB / PC Alternative Finish Kits Strike + faceplate + screws. Use to match CP/PB/PC finishes.
3772-RK32XX / 3772-RK46XX Rebate Kits (Fire Rated) For 13 mm rebates; lip 32/46 mm. Finishes: SS, CP, PB.
3772-AFKITSS / CP / PC Aluminium Door Fixing Kit Converts timber-fix to aluminium-fix; 156×25 mm radius faceplate.
3772-STK25 / 32 / 43 / 47 / 60 Short/Extended Lipped Strikes Lip 25–60 mm. Finishes: SS, CP, PB (60 mm only SS).
3782-FSTK32SS / 64SS Fabricator Strikes (Short Backset Series) Stainless “D” strikes (32/64 mm) — for 3780 series frames where applicable.
3782-RFSTKCP / PB / SC Retrofit Strike Kits Replacement strike kits for existing installs; finish matched.
3772-STKBOX Strike Box (Pk=10) Box cavity behind strike for cleaner latch engagement.
3772-2100SS ES2100 Electric Strike Faceplate Suits timber/standard fixing; DPS capable strikes.
3772AF-2100SS ES2100 Faceplate — Aluminium Fix For aluminium-fix installations with ES2100 strike.
3772-SECKIT Security Faceplate Screw Kit 2× TR20 tamper-resistant screws to replace standard faceplate screws.
SP3570-5018 / -5228 / -5238 / -5258 Extended Spindles Door thickness coverage ~32–200 mm (variant dependent).
SP3700/X7CAM X7 Cam (Latching) Retracts latch and interfaces with locking bar.
SP3700/VCAM V Cam (Locking) Locks/unlocks bar; retracts latch after unlocking.
3770M2-ADAPTOR MkII Latching/Turn Adaptor MkII only (not backward compatible with MkI).
3772-DXKITSC DX Mechanical Digital Kit Codepad + plate + spindle + latching adaptor (furniture ordered separately).
3772-DXKOKITSC DX Digital with Key Override Kit As DXKIT plus lower cylinder provision for key override.
3777-KIT 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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