Lockwood 3770 MkII Mortice Nightlatch — 60 mm Backset, Satin Stainless (SSS)
The Lockwood 3770 MkII is a mortice nightlatch for commercial and institutional doors. It latches automatically on closing, suits 570 cylinders, and is designed for heavy-duty use in schools, hospitals, hotels and similar buildings. Inside operation is via turnsnib or key; outside via key.
Estimated Warehouse Dispatch: 2 Days
Key Features
- Nightlatch function: door auto-latches when closed; key operation outside, turnsnib/key inside.
- 60 mm backset standard (this model).
- Heavy-duty mortice case for commercial environments.
- Through-fixing provision for roses/escutcheons for robust furniture anchoring.
- Compatible with Lockwood 570 cylinders and restricted systems.
- Reversible handing; suits 32–50 mm door thickness.
Fire Rated
- Tested up to 4 hours on fire door assemblies (per manufacturer data).
Specifications
- Item Code: 3770SS
- Function: Mortice Nightlatch (Primary)
- Backset: 60 mm
- Door Thickness: 32–50 mm
- Handing: Reversible
- Case Material: Zinc
- Bolt/Latch: 15 mm projection; stainless steel latchbolt
- Cylinder: 570 profile; 2-cylinder configuration
- Standards (AS4145.2): Security S7, Durability D8, Corrosion C6
- Use: Commercial/industrial/institutional doors
What's In The Box
- Lockwood 3770 MkII mortice nightlatch body (60 mm backset)
- Faceplate & strike (Satin Stainless Steel – SSS)
- Fixing screws
3770 MkII Nightlatch — Item Code Family
Warranty
- Mechanical Warranty: 25-year mechanical warranty (conditions apply).
- Finish & other components: As per Lockwood warranty terms.
Download PDF Resources
|
Lockwood 3700 Series Mortice Locks — Service Manual |
|
Lockwood Selector 3700 Series Mortice Locks — Catalogue |
|
Lockwood 25-Year Mechanical Warranty (Conditions Apply) |
Additional Information
- Suitable for pairing with a wide range of Lockwood 1800/2800 series furniture and 570 cylinders (sold separately).
- Hold-back: not available on nightlatch function.
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.
