Lockwood 4770MKLL Nightlatch Mortice Lock 89mm Backset Including Latch Adaptor - Satin Stainless Steel
The Lockwood 4770MKLL Nightlatch Mortice Lock with Latch Adaptor is a heavy duty locking solution designed for commercial and institutional applications requiring automatic latching and enhanced installation flexibility.
Part of the Lockwood 3700 Series, this nightlatch automatically locks when the door is closed and includes a latch adaptor for expanded functionality and compatibility.
Its robust construction and through-fixing capability ensure secure installation and long term durability in demanding environments.
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Non-Returnable Item: This product is a special order and is not returnable.
Key Features
- Mortice nightlatch that automatically locks when the door is closed
- Includes latch adaptor for expanded application flexibility
- Heavy duty construction for commercial use
- Part of Lockwood 3700 Series
- Through-fixing capability for secure installation of door furniture
Suitable Uses
- Commercial and industrial buildings
- Schools, hospitals and institutions
- Doors requiring automatic latching security
- Applications needing latch adaptor compatibility
Specifications
Dimensions
This diagram illustrates the key dimensions of the Lockwood component, including fixing centres, overall size, and spacing. Always confirm measurements and door preparation against official manufacturer documentation before installation or drilling.
Frequently Asked Questions
What does the latch adaptor do?
The latch adaptor allows compatibility with additional configurations and installation requirements.
Does this lock automatically lock?
Yes, the nightlatch function automatically secures the door when it is closed.
Is this suitable for commercial environments?
Yes, it is designed for heavy duty commercial and institutional use.
Additional Information
- Part of the Lockwood 3700 Series mortice lock range.
- Designed for durability and long service life.
- Provides automatic locking functionality.
- Professional installation recommended.
Lockwood branded products purchased new in Australia from authorised resellers are covered against defects in materials and workmanship for:
- Mechanical components: 25 years
- Electrical and electronic components: 2 years (excluding batteries)
Lockwood Selector 3700 Series Mortice Locks Catalogue
Lockwood Selector 3700 Series Mortice Locks Catalogue
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.
