Lockwood 5772NSF8SS — MkII Universal Primary Lock, Heavy Duty Hub Spring, 8 mm Hub, 127 mm Backset Satin Stainless
The Lockwood 5772NSF8SS is a Selector® 5772 MkII universal primary mortice lock featuring a heavy-duty hub spring and 8 mm hub design. With a 127 mm extended backset and finished in Satin Stainless Steel (SS), this lock is engineered for high-traffic commercial and institutional environments. It delivers secure deadlatching, in-door function configurability, and is compatible with Lockwood 570 oval cylinders and a wide range of commercial furniture.
Estimated Warehouse Dispatch: 11 Days
Non-Returnable Item: This product cannot be returned once purchased
Key Features
- Universal mortice lock body — Selector® MkII platform.
- 127 mm backset for extended clearance door preps.
- 8 mm hub design with heavy-duty hub spring for increased durability in high-use environments.
- Satin Stainless Steel faceplate provides strength and architectural appeal.
- In-door configuration: red/green selector under the faceplate for function adjustments.
- Compatible with Lockwood 570 oval cylinders and master key systems.
- Retrofits into existing Synergy® case sizes for easy replacement or upgrade.
Fire Rated
- Tested up to 4 hours on fire door assemblies (AS 1905.1:2005).
Specifications
- Item Code: 5772NSF8SS
- Function: Universal primary mortice lock body (MkII, 8 mm hub, heavy-duty spring).
- Backset: 127 mm.
- Hub: 8 mm, heavy-duty hub 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 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 5772NSF8SS mortice lock body (127 mm backset, 8 mm hub, heavy-duty hub spring)
- 1 × Satin Stainless Steel faceplate
- 1 × Satin Stainless Steel strike plate
- Fixing screws
- Installation instructions
Suitable Uses
- Commercial and institutional doors requiring an extended 127 mm backset.
- High-traffic applications needing an 8 mm hub with heavy-duty spring for longevity.
- Fire-rated escape and entry doors requiring certified mortice hardware.
- Retrofit upgrades from Synergy® mortice locks to Selector® MkII platform.
Selector® 5772 MkII Escape Locks — Item Code Family (127 mm Backset)
Selector® 5772 MkII — Accessories & Spares (Std. Backset Series)
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) |
Lockwood Warranty Overview
Lockwood branded products are covered by manufacturer warranties issued by ASSA ABLOY Australia Pty Ltd. Warranty periods vary depending on product type, mechanical components, electrical elements, and finish category.
This overview summarises the structure of Lockwood warranty coverage. Full terms, exclusions and claim procedures are set out in the official Lockwood Warranty document.
Warranty Periods Summary
Finish Coverage Guide
- Everbrass finishes: up to 25 years against corrosion, tarnishing and discolouration.
- Stainless steel, polished stainless steel, chrome plating and anodised finishes: typically up to 10 years.
- Decorative finishes including Antique Copper, Architectural Bronze, Oil Rubbed Bronze, Aged Brass, Polished Brass, Satin Brass and related variants: typically up to 2 years against corrosion.
- Unlacquered brass finishes will naturally age and change appearance over time. This is not considered a defect.
- Tea staining of stainless steel is not covered where cleaning and maintenance have not been followed.
What the Warranty Covers
- Defects in material and workmanship during the applicable warranty period.
- Assessment by ASSA ABLOY to determine repair, replacement with the same or closest equivalent product, or refund of purchase price.
Common Exclusions
- Normal wear and tear.
- Misuse, abuse, accidental damage or use outside published specifications.
- Improper maintenance or failure to follow care instructions.
- Unauthorised modification, repair or use of non-genuine parts.
- Exposure to corrosive environments including coastal air, salt spray, chemicals or pollution.
- Removal, refitment or associated labour charges.
- Products not originally sold in Australia through authorised channels.
Warranty Claim Process
- Retain proof of original purchase.
- Return the product through the original place of purchase where applicable.
- If claiming directly, obtain a case number before returning goods.
- Products must be securely packed and clearly identified.
- Warranty assessment determines repair, replacement or refund.
Australian Consumer Law
Lockwood warranties operate in addition to rights available under the Australian Consumer Law. Goods come with guarantees that cannot be excluded. Customers may be entitled to a replacement or refund for a major failure and compensation for reasonably foreseeable loss or damage.
Where a product fails to meet acceptable quality standards and the failure does not amount to a major failure, the customer is entitled to repair or replacement.
