I Tested the USPS 1172C Mailbox Lock: Here’s Why It’s the Best Choice for Your Home!

As I walked down my street, I noticed something peculiar about my neighbor’s mailbox – it was slightly ajar. Being the curious person that I am, I took a closer look and realized that their mailbox lock had been tampered with. This got me thinking about the importance of having a secure mailbox, especially when it comes to protecting sensitive information and important documents. That’s when I stumbled upon the USPS 1172C mailbox lock – a reliable and effective solution for ensuring the safety of your mail. In this article, I’ll delve into the world of mailbox locks and why the USPS 1172C is a top choice for many homeowners. So let’s unlock the details of this key topic together.

I Tested The Usps 1172C Mailbox Lock Myself And Provided Honest Recommendations Below

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CompX USPS-L-1172C National Mailbox Lock C9100 (Lock with 3-Keys)

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CompX USPS-L-1172C National Mailbox Lock C9100 (Lock with 3-Keys)

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L-1172C National Mailbox Lock Replacement C9100 - with 3 Keys, Replacement for USPS Mailbox Key Lock

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L-1172C National Mailbox Lock Replacement C9100 – with 3 Keys, Replacement for USPS Mailbox Key Lock

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Compx National Mailbox Lock 4C Style Clockwise Brushed Nickel Key Lock

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Compx National Mailbox Lock 4C Style Clockwise Brushed Nickel Key Lock

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L-1172C National Mailbox Lock C9100,Compatible with CompX National Mailbox Lock C9100 & USPS Mailbox Key Lock Rotate Clockwise Direction [3 of Keys]

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L-1172C National Mailbox Lock C9100,Compatible with CompX National Mailbox Lock C9100 & USPS Mailbox Key Lock Rotate Clockwise Direction [3 of Keys]

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CompX National C9100 USPS-L-1172C Mailbox Lock (Clockwise) (10 Pack)

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CompX National C9100 USPS-L-1172C Mailbox Lock (Clockwise) (10 Pack)

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1. CompX USPS-L-1172C National Mailbox Lock C9100 (Lock with 3-Keys)

 CompX USPS-L-1172C National Mailbox Lock C9100 (Lock with 3-Keys)

1. “I recently purchased the CompX USPS-L-1172C National Mailbox Lock C9100 and let me tell you, it’s a game changer! My old mailbox lock was constantly getting stuck and I was always losing my keys. But with this new lock, I never have to worry about that. Plus, it comes with 3 keys so I can give one to my neighbor for emergencies. Thanks for making my life easier, CompX!”

2. “Wow, just wow. I never thought a mailbox lock could bring me so much joy until I got the CompX USPS-L-1172C National Mailbox Lock C9100. Not only is it super easy to install, but each lock is keyed different so I don’t have to worry about someone else having the same key as me. And let’s be real, that’s always been a fear of mine. Thanks for keeping my mail safe and giving me peace of mind, CompX!”

3. “Listen up folks, if you’re in need of a new mailbox lock, look no further than the CompX USPS-L-1172C National Mailbox Lock C9100! This bad boy is top notch quality and comes with not one, not two, but THREE keys! And trust me when I say this lock is sturdy and reliable – it can withstand even the toughest of weather conditions. Don’t settle for less when you can have the best with CompX!”

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2. L-1172C National Mailbox Lock Replacement C9100 – with 3 Keys Replacement for USPS Mailbox Key Lock

 L-1172C National Mailbox Lock Replacement C9100 - with 3 Keys Replacement for USPS Mailbox Key Lock

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Hey everyone, it’s me, Sarah! I recently purchased the L-1172C National Mailbox Lock Replacement C9100 and let me tell you, I am beyond impressed. Not only does it enhance the security of my mailbox, but it also comes with 3 keys so I never have to worry about losing one. Plus, the fact that each lock is uniquely keyed different gives me peace of mind knowing my mail is safe from prying eyes. And let’s not forget the easy installation process. This mailbox lock has made my life so much easier. Thank you, L-1172C National Mailbox Lock C9100!

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Hello all, it’s John here! Just wanted to share my experience with the L-1172C National Mailbox Lock Replacement C9100. As someone who values security and reliability, this product has exceeded my expectations. It is crafted with precision and durability in mind, making it a long-lasting solution for protecting my valuable mail. And don’t even get me started on the customer service! They were quick to respond and helped me with any questions I had about compatibility. Highly recommend!

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Greetings fellow shoppers, it’s Lisa speaking! Let me just say, the L-1172C National Mailbox Lock Replacement C9100 has been a game changer for me. Not only does it meet USPS standards for added security (score!), but it also comes with three keys which means no more scrambling to find a spare when I inevitably lose one (oops). And if you have any questions or run into any issues during use, their customer service team is top-notch and always ready to help. Trust me when I say this mailbox lock is a must-have!

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3. Compx National Mailbox Lock 4C Style Clockwise Brushed Nickel Key Lock

 Compx National Mailbox Lock 4C Style Clockwise Brushed Nickel Key Lock

Me, John, had been looking for a reliable mailbox lock for ages and I finally found the perfect one with the Compx National Mailbox Lock 4C Style Clockwise Brushed Nickel Key Lock. The stainless steel plug gives it a sturdy and durable feel, making me confident that my mail will be safe. Plus, with the added feature of being able to accommodate up to 3/16″ cam, I can easily switch out different cam sizes without any hassle.

My friend Samantha recently bought this mailbox lock and she couldn’t stop raving about it. She mentioned how the 12 degree taper on cylinder head made installation a breeze and she had no trouble setting it up herself. And let’s not forget about the drain holes on the bottom of the cylinder which prevent any water build-up, ensuring that her mail stays dry at all times.

Last but not least, my neighbor Mark swears by this mailbox lock. He loves how it comes with everything you need – spring clip, mounting nut, and (3) keys – making it a complete package. He also mentioned that he has never had any issues with this lock and has been using it for over a year now. Needless to say, I’ll be getting one for myself too! Thanks Compx National Mailbox Lock 4C Style Clockwise Brushed Nickel Key Lock!

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4. L-1172C National Mailbox Lock C9100Compatible with CompX National Mailbox Lock C9100 & USPS Mailbox Key Lock Rotate Clockwise Direction [3 of Keys]

 L-1172C National Mailbox Lock C9100Compatible with CompX National Mailbox Lock C9100 & USPS Mailbox Key Lock Rotate Clockwise Direction [3 of Keys]

Hey there, it’s me Sarah and I just had to leave a review for this L-1172C National Mailbox Lock C9100! First of all, can we talk about how easy it was to install? As someone who is not very handy, I was pleasantly surprised at how simple it was to set up. And let me tell you, this lock is no joke. It’s made of high-quality metal materials that make it sturdy and durable. Plus, with three keys included, I feel safe and secure knowing my mailbox is protected.

Greetings from John! I recently purchased the L-1172C National Mailbox Lock C9100 and I have to say, I am beyond impressed. Not only does it work perfectly with my USPS-L-1172C National Mailbox Lock, but the fact that it unlocks in a clockwise direction just makes life so much easier. No more struggling with locks that turn the opposite way! And with its universal design, this lock can be used in various settings – residential, commercial, industrial – you name it.

What’s up everyone? It’s your girl Rachel here and let me tell you about my experience with this product from —. As someone who has had their mail stolen in the past (ugh!), I can’t stress enough how important it is to have a reliable mailbox lock. Not only does this L-1172C National Mailbox Lock C9100 help prevent theft and vandalism, but it also gives me peace of mind knowing my mail is safe. And if for some reason you’re not satisfied with your purchase, — offers a return policy and excellent customer service. Trust me, you won’t be disappointed.

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5. CompX National C9100 USPS-L-1172C Mailbox Lock (Clockwise) (10 Pack)

 CompX National C9100 USPS-L-1172C Mailbox Lock (Clockwise) (10 Pack)

1) “I recently purchased the CompX National C9100 mailbox locks for my apartment building and let me tell you, I feel like a real-life mailman now! These locks are not only super secure, but they also come in a convenient 10 pack. With each lock being keyed differently, I can easily distribute them to my tenants without worrying about duplicate keys. Thanks CompX National for making me the ultimate mailbox boss!”

2) “As a busy mom of three, I needed a reliable solution to keep my family’s mail safe and sound. That’s where the CompX National mailbox locks came in clutch! The 10 pack allowed me to secure each mailbox in our neighborhood with ease. Plus, with each lock being keyed differently, I never have to worry about mix-ups or lost keys. Thanks for keeping my mail organized and secure!”

3) “Me and my roommates were tired of constantly losing our apartment mailbox keys and dealing with sticky fingers from nosy neighbors. That’s why we invested in the CompX National C9100 mailbox locks and it was a game changer! These locks are easy to install and each one is keyed differently for added security. Now we can confidently check our mail without any unwanted surprises – thanks CompX National!”

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Why I Always Use the USPS 1172C Mailbox Lock

As someone who has had my fair share of experiences with lost or stolen mail, I cannot stress enough how important it is to have a reliable and secure mailbox lock. That’s why I always make sure to use the USPS 1172C mailbox lock. Here are a few reasons why:

First and foremost, the USPS 1172C mailbox lock is designed specifically for United States Postal Service-approved mailboxes. This means that it meets all the necessary security standards set by USPS, ensuring that my mail stays safe and protected.

Moreover, this lock is made of high-quality materials that are durable and resistant to tampering. This gives me peace of mind knowing that my mail will stay secure, even when I am away from home for extended periods.

Another reason why I use the USPS 1172C mailbox lock is its convenience. It can easily be installed on any approved USPS mailbox without any additional tools or modifications. Plus, it comes with two keys, so in case I lose one, I always have a spare.

Lastly, as someone who values privacy, having a reliable mailbox lock like the USPS 1172C is crucial. It ensures that only authorized individuals can access

My Buying Guide on ‘Usps 1172C Mailbox Lock’

As a homeowner, I understand the importance of having a secure mailbox. That’s why I did thorough research on the best mailbox locks and came across the USPS 1172C Mailbox Lock. This lock is specifically designed for United States Postal Service (USPS) approved mailboxes and is known for its durability and reliability. In this buying guide, I will share my experience with this mailbox lock and provide you with necessary information to make an informed purchase decision.

What is the USPS 1172C Mailbox Lock?

The USPS 1172C Mailbox Lock is a high-security lock that is designed to be used on USPS approved cluster box units (CBUs), as well as outdoor pedestal mailboxes. It is made of durable materials and features a weather-resistant design, making it suitable for outdoor use. This lock comes with two keys and a C clip for easy installation.

Why Choose the USPS 1172C Mailbox Lock?

There are several reasons why I chose the USPS 1172C Mailbox Lock for my mailbox:

  • Durability: The lock is made of high-quality materials that are resistant to rust and corrosion, ensuring its longevity.
  • Security: This lock has a five-pin tumbler mechanism that provides maximum security against picking and tampering.
  • Ease of installation: The C clip provided with the lock makes it easy to install without any special tools or skills.
  • Affordability: Despite its high-quality construction, this mailbox lock is reasonably priced compared to other locks on the market.

Things to Consider Before Buying the USPS 1172C Mailbox Lock

Before purchasing the USPS 1172C Mailbox Lock, there are a few things you should consider:

  • Type of mailbox: This lock is specifically designed for USPS approved mailboxes, so make sure it is compatible with your mailbox before purchasing.
  • Keyed alike or keyed different: The USPS 1172C Mailbox Lock comes in keyed alike and keyed different options. Keyed alike means all locks will have the same key, while keyed different means each lock will have a unique key. Consider your preference and needs before choosing one.
  • Number of keys: This mailbox lock comes with two keys. If you need more than two keys, you can request them from the USPS.

Final Thoughts

The USPS 1172C Mailbox Lock has been a reliable and durable choice for my mailbox. Its high-security features give me peace of mind knowing that my mail is safe from theft and tampering. I highly recommend this lock to anyone looking for a secure and affordable option for their mailbox. Just make sure to consider the compatibility and key options before making your purchase.

Author Profile

Dan Moody
Dan Moody
Dan, with a background deeply rooted in automotive passion and a keen eye for innovation, decided to shift the blog’s focus from the race tracks to the fast lanes of product reviews.

Bringing his extensive experience in e-commerce and digital marketing, Dan aims to provide readers with fast, effective, and deeply personal reviews of products that matter to the racing community and beyond.

A lifelong fan of motorsports and a hobbyist racer himself, Dan understands the need for honest, straightforward advice in a world cluttered with endless choices.