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Lockwood Mortice Heavy Duty Hub Spring 60 mm Backset

Lockwood Mortice Heavy Duty Hub Spring 60 mm Backset

Lockwood

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SKU:
STK 3772NSFSS
UPC:
9340116090207
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Lockwood 3772NSFSS — Selector® 3772 MkII Universal Primary Lock HD Hub Spring 60 mm Backset Satin Stainless

The Lockwood 3772NSFSS is the Selector® 3772 MkII Universal Primary Lock fitted with a heavy-duty hub spring for enhanced durability in high-use doors. With a 60 mm backset and Satin Stainless Steel finish, this mortice escape lock provides dependable single-action egress and multiple function configuration options, making it suitable for the most demanding commercial and institutional applications.

Delivery truck icon Estimated Warehouse Dispatch: 2 Days

Key features icon Key Features

  • Universal primary mortice lock body for the Selector® 3772 MkII platform.
  • Fitted with heavy-duty hub spring for increased strength and extended service life.
  • Escape lock design: inside handle always allows free egress.
  • 60 mm backset (standard). Extended backset versions (89 mm, 127 mm) available separately.
  • Reversible handing — suits left or right hand doors without disassembly.
  • Compatible with Lockwood 570 oval cylinders, restricted systems, and a wide range of escutcheons and turns.
  • Designed for high-traffic commercial, institutional, and public buildings.

Fire rating icon Fire Rated

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

Specifications icon Specifications

  • Item Code: 3772NSFSS
  • Function: Universal primary mortice escape lock body (MkII)
  • Backset: 60 mm
  • Hub: Heavy-duty hub spring
  • Material: Zinc alloy case with stainless steel faceplate
  • Door Thickness: 32–50 mm (extension packs available for thicker doors)
  • Handing: Reversible
  • Finish: Satin Stainless Steel (SS)
  • Standards: AS4145.2 (Durability D8, Security S7, Corrosion C6)

Contents icon What's In The Box

  • 1 × Lockwood 3772 MkII Universal Primary Lock (HD hub spring, 60 mm backset)
  • 1 × Stainless steel faceplate
  • 1 × Strike plate
  • Fixing screws
  • Installation instructions

Suitable uses icon Suitable Uses

  • Commercial, institutional, and public buildings requiring robust escape locks.
  • High-traffic doors needing enhanced hub spring strength.
  • Fire-rated egress doors where compliance with AS1905.1 is mandatory.
  • Retrofit replacement for Synergy 3572SC primary locks with direct compatibility.

Product code list icon Selector® 3772 MkII Escape Locks — Item Code Family

Item Code Function Description
3772 / 4772 / 5772 Escape Lock (Primary) Base mortice escape lock, 60 / 89 / 127 mm backset. Inside handle always free, outside handle rigid.
3772V Anti-vandal Escape Lock Outside opened by key when unlocked; inside always free.
3772VT Anti-vandal Escape Lock + Turn Cylinder outside, turn inside; inside always free.
3772X Key Entry Escape Lock Outside opened by key at all times; inside handle always free.
3772XT Key Entry Escape Lock + Turn Outside opened by key; inside opened by turn or handle.
3772-V Escape Lock with Internal Cylinder Inside: handle always free; key inside locks/unlocks outside handle.
3772-T Escape Lock with Turn Inside: handle always free; turnknob locks/unlocks outside handle.
3772VV Anti-vandal Escape Lock with Internal Cylinder Double cylinder; outside key locks/unlocks handle; inside key also operates bolt.
3772XV Key Entry Escape Lock with Internal Cylinder Double cylinder; outside key entry at all times; inside always free.
3772-TA Anti-lockout Escape Lock + Turn Turn inside; outside handle operable when unlocked. Prevents accidental lockout.
3772VTA Anti-lockout, Anti-vandal Escape Lock + Turn Cylinder outside, turn inside; anti-vandal and anti-lockout functions combined.
3772V-H Holdback Anti-vandal Escape Lock Latch can be held in; outside key locks/unlocks; inside always free. Not fire door rated.
3772XVH Holdback Key Entry Escape Lock with Internal Cylinder Double cylinder; holdback function; inside always free. Not fire door rated.
3772VTH Holdback Anti-vandal Escape Lock + Turn Cylinder outside, turn inside; holdback enabled. Not fire door rated.

Accessories icon Selector® 3772 MkII Escape Locks — Accessories & Spares

Item Code Description Notes
3772-FINKITCP / PB / PC Alternative Finish Kits Includes strike, faceplate & screws. CP=Chrome Plate, PB=Polished Brass, PC=Powdercoat.
3772-RK32XX / 3772-RK46XX Fire Rated Rebate Kits Suits 13 mm rebates. Lip lengths 32 mm or 46 mm. Finishes: SS, CP, PB.
3772-AFKITSS / CP / PC Aluminium Door Fixing Kit Converts timber fix to aluminium door fixing. 156×25 mm faceplate. Finishes: Stainless, Chrome Plate, Powdercoat.
3772-STK25 / STK32 / STK43 / STK47 / STK60 Short / Extended Lipped Strikes Lip lengths 25–60 mm. Finishes: SS, CP, PB. (STK60 only in SS).
3772-2100SS / 3772AF-2100SS ES2100 Electric Strike Faceplates Suits Selector® 3770 Series. AF version for aluminium fixing. For monitored electric strikes.
3772-SECKIT Security Faceplate Screw Kit Includes 2 × tamper resistant TR20 torx drive screws.
SP3570-5018 / -5228 / -5238 / -5258 Extended Spindles For thicker doors (32–200 mm). Supplied individually or in packs.
SP3700/X7CAM X7 Cam Latching cam. Retracts latchbolt, locks/unlocks locking bar.
SP3700/VCAM V Cam Locks/unlocks locking bar, retracts latch bolt after unlocking.
3770M2-ADAPTOR Latching/Turn Adaptor Adaptor for MkII mortice locks. Not backwards compatible with MkI.
3772-DXKITSC DX Digital Conversion Kit Includes digital codepad, mounting plate, spindle, screws, and latching adaptor.
3772-DXKOKITSC DX Digital with Key Override Kit As above, with lower cylinder assembly for key override.
3777-KIT Dual Entry Conversion Kit Lower cylinder mounting plate, spindle cam & screws. Converts 3772 to dual entry (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 25 Year Mechanical Warranty (Conditions Apply)

 

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