---
product_id: 304342750
title: "4140 Mailbox Lock – Replacement, Multipurpose Mailbox Lock for Several Brands – Nickel Finish, ILCO 1003M Keyway, Opens Counter-Clockwise with 90º Rotation"
brand: "prime-line"
price: "₱1908"
currency: PHP
in_stock: true
reviews_count: 5
category: "Prime Line"
url: https://www.desertcart.ph/products/304342750-4140-mailbox-lock-replacement-multipurpose-mailbox-lock-for-several-brands
store_origin: PH
region: Philippines
---

# 90º counter-clockwise rotation for smooth operation 5-pin tumbler lock for enhanced security Includes 5 zinc-plated steel cams & brass pins 4140 Mailbox Lock – Replacement, Multipurpose Mailbox Lock for Several Brands – Nickel Finish, ILCO 1003M Keyway, Opens Counter-Clockwise with 90º Rotation

**Brand:** prime-line
**Price:** ₱1908
**Availability:** ✅ In Stock

## Summary

> 🔐 Secure your mail, secure your peace of mind.

## Quick Answers

- **What is this?** 4140 Mailbox Lock – Replacement, Multipurpose Mailbox Lock for Several Brands – Nickel Finish, ILCO 1003M Keyway, Opens Counter-Clockwise with 90º Rotation by prime-line
- **How much does it cost?** ₱1908 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ph](https://www.desertcart.ph/products/304342750-4140-mailbox-lock-replacement-multipurpose-mailbox-lock-for-several-brands)

## Best For

- prime-line enthusiasts

## Why This Product

- Trusted prime-line brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Smart Security Locking:** Key cannot be removed when unlocked, preventing accidental mailbox exposure and boosting your peace of mind.
- • **Complete Replacement Kit:** Includes 2 keys, 5 steel cams, brass pins, and spring steel locking clip—everything you need for a hassle-free install.
- • **Universal Fit for Top Brands:** Compatible with American Device, Auth-Florence, Bommer & Miami Carey mailboxes—never worry about compatibility again.
- • **Effortless Installation & Operation:** Quick 90º counter-clockwise turn opens your mailbox smoothly—get back to your day without delay.
- • **Built to Last with Premium Materials:** Diecast body with nickel-plated finish ensures durability and a sleek, professional look that stands the test of time.

## Overview

The Prime-Line S 4140 Mailbox Lock is a durable, nickel-finished 5-pin tumbler replacement lock compatible with multiple mailbox brands. Featuring a smart locking mechanism that prevents key removal when unlocked, it includes a full kit with keys and cams for easy installation and reliable security.

## Description

Easily replace a broken or lost mailbox lock with our multipurpose replacement mailbox lock. Installation is quick and easy and the lock works on a variety of brands, including: American Device, Auth-Florence, Bommer, and Miami Carey. Additionally, this replacement mailbox lock has a security feature that prevents the key from being removed when in the unlocked position, which prevents forgetting the key in the lock, ensuring the mailbox is locked every time it is used. The replacement lock includes a total of 5 zinc plated steel cams, brass pins, a spring steel locking clip and 2 keys. It is made of diecast with a nickel plate finish and a counter-clockwise rotation to open. Be sure to view the manufacturer’s How-To Installation Video also linked on this page.

Review: Serrure de boîte à mal - Très bonne serrure de boîte a mal très fiable et reçus dans un délai très vite Merci
Review: Worked as intended for mail box. - Worked as intended for mail box.

## Features

- REPLACEMENT LOCK – The S 4140 multipurpose replacement mailbox lock is an easy fix and can easily replace lost or broken mailbox locks. This is a 5-pin tumbler lock..Note: Measure your door's backset, cross bore and thickness to ensure you find the right fit
- WORKS FOR SEVERAL BRANDS – This replacement mailbox lock works for several brands of mailboxes, including: American Device, Auth-Florence, Bommer, and Miami Carey.
- INCLUDES – Replacement lock kit includes a total of 5 zinc-plated steel cams, brass pins, a spring steel locking clip and 2 keys.
- LOCKING SECURITY FEATURE – This lock has a security feature that prevents the key from being removed when in the unlocked position, which prevents forgetting the key, and ensuring the mailbox is locked every time it’s used.
- DURABLE, STRONG CONSTRUCTION – Made of diecast with a nickel-plated face, this replacement lock is strong and durable, sure to last the test of time..For all dimensional information please refer to the line art and compare to your needs before purchasing

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000B4N0PC |
| Additional Features | Keyless |
| Brand | PRIME-LINE |
| Brand Name | PRIME-LINE |
| Color | Nickel |
| Control Method | Remote |
| Controller Type | Hand Control |
| Customer Reviews | 4.4 out of 5 stars 4,131 Reviews |
| Finish Types | Nickel-plated,Nickel |
| Global Trade Identification Number | 00049793041401 |
| Included Components | 2 keys, lock and fasteners |
| Item Dimensions | 32 x 97 x 124 millimeters |
| Item Type Name | Mailbox lock |
| Item Weight | 0.22 Pounds |
| Item dimensions L x W x H | 32 x 97 x 124 millimeters |
| Lock Type | Key Lock |
| Lock type | Key Lock |
| Manufacturer | Prime-Line Products |
| Manufacturer Part Number | S 4140 |
| Material | Diecast / Steel |
| Material Type | Diecast / Steel |
| Model Name | Mailbox Lock, 5 Cam, Nickel Finish, ILCO 1003M Keyway, Opens Counter-Clockwise, 90 Degree Rotation |
| Model Number | S 4140 |
| Number of Items | 1 |
| Number of Pieces | 1 |
| Recommended Uses For Product | Security |
| Recommended uses for product | Security |
| Shape | Round |
| Special features | Keyless |
| Style Name | Mailbox Lock |
| UPC | 049793041401 |
| Unit Count | 1 Count |

## Product Details

- **Brand:** PRIME-LINE
- **Item dimensions L x W x H:** 32 x 97 x 124 millimeters
- **Lock type:** Key Lock
- **Material:** Diecast / Steel
- **Special features:** Keyless

## Images

![4140 Mailbox Lock – Replacement, Multipurpose Mailbox Lock for Several Brands – Nickel Finish, ILCO 1003M Keyway, Opens Counter-Clockwise with 90º Rotation - Image 1](https://m.media-amazon.com/images/I/61+SGc1drEL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Serrure de boîte à mal
*by Y***E on 18 March 2026*

Très bonne serrure de boîte a mal très fiable et reçus dans un délai très vite Merci

### ⭐⭐⭐⭐⭐ Worked as intended for mail box.
*by C***L on 1 June 2026*

Worked as intended for mail box.

### ⭐⭐⭐⭐⭐ Easy to install and works perfectly.
*by G***0 on 4 August 2024*

We have community mail boxes and I always thought the postal service was responsible for maintaining them. We dealt with a weak and then broken lock for quite some time before I learned the lock was my responsibility. Bought this lock and had the old one replaced in about 3 minutes. Comes with several sizes and shapes depending on the type of box you have, and I expect you could find at least one that would work for just about any installation. Great value.

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**Shop now:** [https://www.desertcart.ph/products/304342750-4140-mailbox-lock-replacement-multipurpose-mailbox-lock-for-several-brands](https://www.desertcart.ph/products/304342750-4140-mailbox-lock-replacement-multipurpose-mailbox-lock-for-several-brands)

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*Product available on Desertcart Philippines*
*Store origin: PH*
*Last updated: 2026-09-02*