---
product_id: 509237797
title: "CompX USPS-L-1172C National Mailbox Lock New Style C9100 (Lock with 3-Keys)"
brand: "compx national"
price: "27253 Ft"
currency: HUF
in_stock: true
url: https://www.desertcart.hu/products/509237797-compx-usps-l-1172c-national-mailbox-lock-new-style-c9100
store_origin: HU
region: Hungary
---

# USPS-L-1172C certified lock Fits cams up to 3/16" thick Includes 3 precision keys CompX USPS-L-1172C National Mailbox Lock New Style C9100 (Lock with 3-Keys)

**Brand:** compx national
**Price:** 27253 Ft
**Availability:** ✅ In Stock

## Summary

> 🔐 Lock in your mail security with USPS-approved precision!

## Quick Answers

- **What is this?** CompX USPS-L-1172C National Mailbox Lock New Style C9100 (Lock with 3-Keys) by compx national
- **How much does it cost?** 27253 Ft with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hu](https://www.desertcart.hu/products/509237797-compx-usps-l-1172c-national-mailbox-lock-new-style-c9100)

## Best For

- compx national enthusiasts

## Why This Product

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

## Key Features

- • **Triple Key Access:** Comes with 3 keys so you’re never locked out or left scrambling.
- • **USPS-Certified Security:** Only mailbox lock that meets and exceeds USPS-L-1172C specs for trusted protection.
- • **Easy Clockwise Operation:** Smooth clockwise turn mechanism for effortless locking and unlocking.
- • **Sleek Stainless Steel Build:** Modern, durable metal construction that resists wear and blends seamlessly with your mailbox.
- • **Universal Cam Compatibility:** Designed to fit cams up to 3/16" thick, perfect for most mailbox models.

## Overview

The CompX USPS-L-1172C National Mailbox Lock (model C9100) is a USPS-certified replacement lock designed for front-load, rear-load, surface mount, and pedestal mailboxes. It features a durable stainless steel body, operates clockwise, fits cams up to 3/16" thick, and includes 3 keys for convenient access. This lock ensures USPS-compliant security and reliable performance for your mailbox.

## Description

This lock and key set is a replacement for USPS 4C Front-Load, Rear-Load, Surface Mount and Pedestal Mount mailboxes. Includes one lock and 3-keys. Does not include retainer clip, cam and nut; you will need to use these from the old lock you are replacing or order them separately.

## Features

- Only mailbox lock to meet and exceed United States Postal Service specification "USPS-L-1172C"
- Accommodates up to 3/16" thick cam.
- C9100 operates clockwise
- Includes lock and 3 keys

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | CompX National |
| Part Number | USPS-L-1172C |
| Product Dimensions | 5.08 x 2.54 x 2.54 cm; 82 g |
| Item model number | C9100 |
| Size | Standard |
| Colour | Stainless Steel |
| Style | Modern |
| Material | Metal |
| Shape | Rectangular |
| Item Package Quantity | 1 |
| Number of Pieces | 1 |
| Special Features | Key Unlock |
| Included Components | Key |
| Batteries included? | No |
| Batteries Required? | No |
| Item Weight | 82 g |

## Product Details

- **Brand:** compx national
- **Special feature:** Key Unlock
- **Lock type:** Key Lock
- **Item dimensions L x W x H:** 5.1 x 2.5 x 2.5 centimetres
- **Material:** Metal

## Images

![CompX USPS-L-1172C National Mailbox Lock New Style C9100 (Lock with 3-Keys) - Image 1](https://m.media-amazon.com/images/I/71MnUeF8m4L.jpg)

## Questions & Answers

**Q: If all I have is an empty hole in my mail slot door, will this kit give me everything I need to install the lock?**
A: This lock does not include the tailpiece that mounts on the back of the lock and is what turns to lock the mailbox door. That is sold separately and the part number is: CompX C7120. Thank you, NLS Products.

**Q: l need to buy the latch and the lock together?  The previous owner took everything with him.**
A: No, this lock does not include the latch.
You get exactly what is pictured.
It's odd that the seller would represent otherwise.

**Q: can the mailman open the lock**
A: I am a mailman. We have a key that open cluster boxes, but we do not have a master key that will open this lock.

**Q: Mail boxs locks for door**
A: Hi in some towns the post office doesn’t change mail box keys anymore so I had go buy my locks & 
Install them , so be careful , look at what you need & Match them on amazon locks & pick the best one

## Frequently Bought Together

- CompX USPS-L-1172C National Mailbox Lock C9100 (Lock with 3-Keys)
- Prime-Line S 4140 Mailbox Lock – Replacement, Multipurpose Mailbox Lock for Several Brands – ILCO 1003M Keyway, Opens Counter-Clockwise with 90º Rotation, Nickel Finish (1 Set)

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**Shop now:** [https://www.desertcart.hu/products/509237797-compx-usps-l-1172c-national-mailbox-lock-new-style-c9100](https://www.desertcart.hu/products/509237797-compx-usps-l-1172c-national-mailbox-lock-new-style-c9100)

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*Product available on Desertcart Hungary*
*Store origin: HU*
*Last updated: 2026-10-02*