
Lockwood 4571 Mortice Deadlock Thru Fixable - 89mm Backset - Satin Chrome
The Lockwood 4571 Mortice Deadlock Thru Fixable is a heavy duty primary locking solution designed for high security commercial applications.
Built on the robust Lockwood 3570 series platform, it delivers strong deadlocking performance with through-fix capability for secure door furniture installation.
Ideal for commercial and industrial environments, this lock is engineered for durability, strength and long-term reliability.
Usually ships in 10 business days
Key Features
- 89mm backset for commercial door applications
- Through-fixable design for secure furniture mounting
- 19mm stainless steel bolt for strong deadlocking
- Compatible with Lockwood cylinders and door furniture
- Heavy duty construction for high traffic environments
Suitable Uses
- Commercial and industrial buildings
- Schools, hospitals and institutions
- Doors requiring high security deadlocking
- Projects requiring through-fix hardware installation
Specifications
Frequently Asked Questions
What does through-fixable mean?
It allows door furniture to be securely fixed through the lock body for added strength.
Is this suitable for commercial use?
Yes, it is designed for heavy duty commercial environments.
What is a common installation issue?
Incorrect alignment of the strike can affect bolt engagement.
Additional Information
- Part of the Lockwood 3570 series mortice lock range.
- Widely used in Australian commercial projects.
- Supports flexible door hardware configurations.
- 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 Synergy Mortice Locks Catalogue

Lockwood Synergy 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.