Lockwood 4770MKLL Nightlatch Mortice Lock 89mm Backset - Satin Stainless Steel
The Lockwood 4770MKLL Nightlatch Mortice Lock is a heavy duty locking solution designed for commercial and institutional applications where automatic latching and reliable security are required.
Part of the Lockwood 3700 Series, this mortice nightlatch automatically locks when the door is closed, providing convenient and effective access control.
Its robust construction and through-fixing capability ensure secure installation and long term durability.
Usually ships in 10 business days
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
- Heavy duty construction for commercial use
- Part of Lockwood 3700 Series
- Operated by key outside and turnknob or key inside
- Through-fixing for secure installation of door furniture
Suitable Uses
- Commercial and industrial buildings
- Schools, hospitals and institutions
- Doors requiring automatic latching security
- Main entry or controlled access doors
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 is a nightlatch?
A nightlatch automatically locks when the door closes, providing convenience and security without needing to manually lock the door.
Is this suitable for commercial use?
Yes, it is designed for heavy duty use in commercial and institutional environments.
How is the lock operated?
It is operated by a key on the outside and a turnknob or key on the inside.
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
Lockwood branded products are covered by manufacturer warranties issued by ASSA ABLOY Australia Pty Ltd. Warranty periods vary by product type, with separate cover for mechanical components, electrical and electronic parts, keys, and finishes.
The summary below sets out the standard warranty structure. All warranty claims are handled by Terry's Tradies Pty Ltd and its associated websites, trading names, and subsidiaries. Full terms and exclusions are set out in the official Lockwood warranty document linked at the base of this page.
Warranty 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.
- PVD and VIVID finishes: typically up to 10 years.
- Symmetry range finishes: typically up to 5 years.
- Decorative finishes (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 naturally age and change appearance over time. This is not considered a defect.
- Tea staining of stainless steel is not covered where the required cleaning and maintenance have not been followed.
How to Make a Claim
- Contact Terry's Tradies Pty Ltd and its associated websites, trading names, and subsidiaries with your proof of original purchase.
- Keep the product securely packed and clearly identified, ready for assessment.
- Where a claim is escalated to the manufacturer, ASSA ABLOY may issue a case number before goods are returned.
- ASSA ABLOY assesses the claim and determines repair, replacement with the same or closest equivalent product, or refund of the purchase price.
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.
These manufacturer warranties apply in addition to your rights under the Australian Consumer Law. Our goods come with guarantees that cannot be excluded under the ACL. You are entitled to a replacement or refund for a major failure and to compensation for any other reasonably foreseeable loss or damage. Where a failure does not amount to a major failure, you are entitled to have the goods repaired or replaced.
