PRIME-LINE
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Prime-Line S 4140 Mailbox Lock Replacement, Multipurpose Lock for Several Brands ILCO 1003M Keyway, Opens Counter-Clockwise with 90 Rotation, Nickel Finish (1 Set)
Prime-Line S 4140 Mailbox Lock Replacement, Multipurpose Lock for Several Brands ILCO 1003M Keyway, Opens Counter-Clockwise with 90 Rotation, Nickel Finish (1 Set)
Prime-Line S 4140 Mailbox Lock Replacement, Multipurpose Lock for Several Brands ILCO 1003M Keyway, Opens Counter-Clockwise with 90 Rotation, Nickel Finish (1 Set)
Prime-Line S 4140 Mailbox Lock Replacement, Multipurpose Lock for Several Brands ILCO 1003M Keyway, Opens Counter-Clockwise with 90 Rotation, Nickel Finish (1 Set)
Prime-Line S 4140 Mailbox Lock Replacement, Multipurpose Lock for Several Brands ILCO 1003M Keyway, Opens Counter-Clockwise with 90 Rotation, Nickel Finish (1 Set)
Prime-Line S 4140 Mailbox Lock Replacement, Multipurpose Lock for Several Brands ILCO 1003M Keyway, Opens Counter-Clockwise with 90 Rotation, Nickel Finish (1 Set)
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Prime-Line S 4140 Mailbox Lock Replacement, Multipurpose Lock for Several Brands ILCO 1003M Keyway, Opens Counter-Clockwise with 90 Rotation, Nickel Finish (1 Set)
Prime-Line S 4140 Mailbox Lock Replacement, Multipurpose Lock for Several Brands ILCO 1003M Keyway, Opens Counter-Clockwise with 90 Rotation, Nickel Finish (1 Set)
Prime-Line S 4140 Mailbox Lock Replacement, Multipurpose Lock for Several Brands ILCO 1003M Keyway, Opens Counter-Clockwise with 90 Rotation, Nickel Finish (1 Set)
Prime-Line S 4140 Mailbox Lock Replacement, Multipurpose Lock for Several Brands ILCO 1003M Keyway, Opens Counter-Clockwise with 90 Rotation, Nickel Finish (1 Set)
Prime-Line S 4140 Mailbox Lock Replacement, Multipurpose Lock for Several Brands ILCO 1003M Keyway, Opens Counter-Clockwise with 90 Rotation, Nickel Finish (1 Set)
Prime-Line S 4140 Mailbox Lock Replacement, Multipurpose Lock for Several Brands ILCO 1003M Keyway, Opens Counter-Clockwise with 90 Rotation, Nickel Finish (1 Set)
Prime-Line S 4140 Mailbox Lock Replacement, Multipurpose Lock for Several Brands ILCO 1003M Keyway, Opens Counter-Clockwise with 90 Rotation, Nickel Finish (1 Set)
Reliable, cost‑effective, and easy to use, the Prime‑Line S 4140 Mailbox Lock Set is a smart choice for secure mail protection.
Prime-Line S 4140 Mailbox Lock Replacement, Multipurpose Lock for Several Brands ILCO 1003M Keyway, Opens Counter-Clockwise with 90 Rotation, Nickel Finish (1 Set)
Item #: 42398

Prime-Line S 4140 Mailbox Lock Replacement, Multipurpose Lock for Several Brands ILCO 1003M Keyway, Opens Counter-Clockwise with 90 Rotation, Nickel

Item #: 42398

AUD 28

Price Details

Excluding Shipping & Custom charges ( Shipping and custom charges will be calculated on checkout )

*All items will import from US

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us Imported from USA store
Order now and get it around Thursday, July 09
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Reliable, cost‑effective, and easy to use, the Prime‑Line S 4140 Mailbox Lock Set is a smart choice for secure mail protection.
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What Stands Out

Multipurpose Compatibility
Designed to replace locks for various mailbox brands, ensuring versatility and ease of installation for users looking to upgrade their security effortlessly.
Durable Nickel Finish
Features a robust nickel finish that resists rust and corrosion, guaranteeing long-lasting durability and maintaining aesthetic appeal over time.
Easy Counter-Clockwise Operation
Opens efficiently with a 90º counter-clockwise rotation, providing quick access and enhancing user convenience when retrieving mail.

Product Details

Easily replace broken or lost mailbox lock with our multipurpose replacement lock. Works on various brands. Features a security feature to prevent key from being removed in unlocked position. Made of diecast with nickel finish. Quick and easy installation. Free How-To Installation Video. Shop at Ubuy Kiribati
  • Easy Replacement Lock: Quickly replaces lost or damaged mailbox locks; includes Hudson 1003M key and 5 cams for flexible fit
  • Wide Compatibility: Works with many residential, cluster, and community mailboxes across multiple brands including American Device, Auth-Florence, Bommer, and Miami-Carey
  • Complete Lock Kit: Includes 5 zinc-plated steel cams, brass pins, spring steel clip, and 2 keys for full installation
  • Security Features: Prevents key removal when unlocked to help ensure the mailbox is locked after each use
  • Installation Notes: Unlocks with a counter-clockwise turn; includes a retaining hex nut and clip for secure mounting
Brand NamePRIME-LINE
Recommended Uses For ProductSecurity
Number of Pieces1
Included Components2 keys, lock and fasteners
Model NumberS 4140
UPC049793041401
Model NameMailbox Lock
Global Trade Identification Number00049793041401
ManufacturerPrime-Line Products
Unit Count1.0 Count
Manufacturer Part NumberS 4140
Item Type NameMailbox lock
Additional FeaturesWeather Resistant
Lock TypeKey Lock
Controller TypeHand Control
Control MethodTouch
Smart Home CompatibilityNot Smart Home Compatible
Style NameMailbox Lock
ColorNickel Plated
ShapeRound
Material TypeDiecast / Steel
Finish TypesNickel,Nickel-plated
Item Dimensions1.25 x 3.81 x 4.88 inches (3.2 x 9.7 x 12.4 cm)
Item Weight0.22 Pounds (100 grams)
BrandPRIME-LINE
Special FeatureWeather Resistant
Item dimensions L x W x H1.25 x 3.81 x 4.88 inches (3.2 x 9.7 x 12.4 cm)
MaterialDiecast / Steel

Who Should Buy?

Suitable For
  • Homeowners

    Ideal for homeowners needing a reliable replacement mailbox lock to enhance security and accessibility.

  • Property Managers

    Great for property managers looking to replace multiple mailbox locks for efficiency across various properties.

  • DIY Enthusiasts

    Perfect for DIY enthusiasts who prefer easy-to-install locks for home improvement projects or mailboxes.

Not Suitable For
  • Commercial Use

    May not suit commercial users requiring high-security locks for business premises or mailbox systems.

  • Heavy Usage

    Not ideal for high-traffic areas where locks face frequent and heavy use, risking wear and damage.

  • Complex Systems

    Unsuitable for complex locking systems needing advanced features or compatibility with specific electronic devices.

Product Description

Have any Query? Chat with us

Customer Questions & Answers

  • Question: Is this mailbox lock compatible with my brand?

    Answer: Yes, it is compatible with many popular brands including American Device, Auth‑Florence, Bommer, and Miami‑Carey.
  • Question: What tools do I need for installation?

    Answer: No tools are required for installation, making it very user-friendly.
  • Question: How does the locking mechanism work?

    Answer: It features a 5-pin tumbler mechanism and a 90-degree counter-clockwise rotation to unlock.

PRIME-LINE Mailbox Locks S 4140 Editorial Review

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This mailbox lock comes with five sizes of cams for versatility, and is easy to install. There is no certainty that it will fit some mailbox brands, so it is recommended that customers check their measurements before purchasing. The keys have been reported as easily bendable, but the lock has been deemed sturdy. One issue some customers had was that the turn on the key was opposite. Overall, customers found this to be a great replacement option for broken mailbox locks, offering a great value for the money.

Customer Reviews & Ratings

4.4
3925 customers ratings
  • 5 Star
    71%
  • 4 Star
    14%
  • 3 Star
    8%
  • 2 Star
    2%
  • 1 Star
    5%

Review this product

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Pros

  • Comes with multiple cams for versatility
  • Easy to install
  • Sturdy build
  • Great value for the money

Cons

  • May not fit all brands of mailboxes

Platform Trust & Buyer Confidence

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4.3/5 9,000 + reviews
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MT
Mohd
Verified buyer

“The product received very good packaging & safe…Thank You”

16 June 2026 · via Trustpilot
SJ
Shawati
Verified buyer

“Accurate delivery timing given”

16 June 2026 · via Trustpilot
YB
Youcef
Verified buyer

“Not madly expensive like I thought, and much quicker than promised.”

15 June 2026 · via Trustpilot
LM
Leila
Verified buyer

“Never dealt with Ubuy before, but everything worked out great. Seamless cross border purchasing and shipping. Thanks!”

6/7/2026 · via Trustpilot
KA
Kwame
Verified buyer

“The process was smooth, with clear communication and timelines. This was my 1st purchase and I am really impressed. I will definitely be coming back.”

12 June 2026 · via Trustpilot
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Important information

  • Limitations : For products shipped internationally, please note that any manufacturer warranty may not be valid; manufacturer service options may not be available; product manuals, instructions, and safety warnings may not be in destination country languages; the products (and accompanying materials) may not be designed in accordance with destination country standards, specifications, and labeling requirements; and the products may not conform to destination country voltage and other electrical standards (requiring use of an adapter or converter if appropriate). The recipient is responsible for assuring that the product can be lawfully imported to the destination country. When ordering from Ubuy or its affiliates, the recipient is the importer of record and must comply with all laws and regulations of the destination country.
  • Not all the products listed on Ubuy are for sale, as Ubuy is a global search engine. Products are subject to export/trade regulations.

AUD 28

Order now and get it around Thursday, July 09

QTY:

Secured transactionsecured transaction

Ubuy works hard to protect your security and privacy. Our advanced payment security system ensures confidentiality by encrypting your information during transmission using AES (Advanced Encryption Standards) and SSL (Secure Socket Layer) protocols. Your payment details are 100% secure as we do not share your payment details with third party sellers.

Our Top Logistics Partners
  • fedex
  • dhl
Fastest cross-border delivery

Features & Benefits

  • Enhances mailbox security for homeowners and property managers.
  • Compatible with many popular mailbox brands.
  • Features a versatile multi-cam system for easy installation.
  • Constructed from high-quality materials for durability.
  • Includes everything needed for straightforward setup.
  • Provides peace of mind with enhanced security features.