Bunker Mailbox : 1/8 Inch Steel Locking Mailbox

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The Bunker — Rugged Mail Protection
10" x 10.25" x 20" @ 38 LBS.

Formerly known as the M1-LT Mailbox.

We originally named it after the Abrams tank because our mailboxes are truly “built like a tank!” However, most people aren’t familiar with that military vehicle, so we wanted a name that instantly communicates strength and protection.

That’s how The Bunker was born. Just as soldiers relied on bunkers in battle for safety and security, this mailbox is designed to give you peace of mind with security. Rugged, resilient, and ready for anything—it’s built to protect your mail like it’s under heavy guard.

Fort Knox Postal Delivery Guarantee


How It Works

  1. The mail carrier inserts incoming mail into the slot at the top (10” W x 1.75” H).
  2. Mail drops into the always-locked compartment.
  3. Only you have the key—your mail waits safely inside until you retrieve it.

The Bunker has four pre-drilled holes on the bottom designed to fit our Bunker Posts. You can also install it on wood, metal, or masonry surfaces.


Outgoing Mail (Optional)

  • This is a “Limited Service” mailbox, designed for incoming mail only.
  • An outgoing mail option is available and adds a 1/8" flag and slot beneath the incoming slot.
  • Holds 1–4 outgoing envelopes.
  • Outgoing mail is not lockable and must stick out approximately 1 inch for carrier pickup.
  • No concealment door like our larger models.

Special Features of The Bunker

  • 38 lbs. of solid steel for security
  • 1" continuous welded steel hinge
  • All hand-welded design (no spot welds or rivets)
  • Incoming slot: 1 ¾" x 10"
  • 7.5" recessed slot depth to:
    • Accept small packages
    • Prevent hand entry
  • 7-pin tubular pick-proof lock (upgradable)
  • High-performance powder coating (inside & out)
  • Standard colors: Slate Gray or Glossy Black
  • Special colors available at an additional cost - More information below

Included with Every Bunker

  • Free 1 ¾" vinyl adhesive address numbers for the front door
    • Request specific numbers at time of order
    • 3" side numbers available
  • Pre-drilled for our steel posts or racks, or other suitable surfaces
  • Can be installed on a breakaway (surface mount) post

Custom Options & Upgrades

  • Lock upgrades:
    • Slam Lock → Accept larger packages through the locked door
    • Medeco Lock® → Hardened steel upgrade
  • Color upgrades:
  • Outgoing mail option:
    • Add flag + outgoing slot (1–4 envelopes, non-locking)
  • Post options:
    • In-Ground steel post (2.5" x 2.5" x 57")
    • Surface Mount steel post (2.5" x 2.5" x 36")
    • Curb mounted for an existing sidewalk
  • Rear door access (2 options, same price):
    • Front door replaced with a welded steel plate
    • Front and rear doors keyed alike
    • If an upgraded lock is purchased, it is included on both doors

Shipping and Lead Time

All Fort Knox Mailboxes are built in the USA and ship directly from our facility in Grants Pass, Oregon. Each unit is fabricated for maximum quality and securely packaged to handle the stress of transit.

Production Time

  • In stock: The Bunker Mailbox ships the same or next business day.
  • Not in stock: Production may take up to 10 business days.
  • Multiple units: Contact us for current lead times.

Transit Time

  • FedEx or UPS Ground: Typically, 2–6 business days, depending on location.
  • Freight: 1–10 business days for oversized or multi-unit shipments (quote required).

Shipping Carrier

  • FedEx or UPS Ground for approximately 1–6 Bunker mailboxes without steel racks.
  • Freight for 7+ units or orders including racks (often more cost-effective for larger quantities).

Tracking
Tracking information is automatically emailed as soon as your order leaves our facility in Oregon.

Need it sooner?
Rush builds are sometimes available, depending on the production schedule. Contact us before ordering to confirm the fastest ship date and current stock status.

  • 5 stars: 50 (100%)
  • 4 stars: 0 (0%)
  • 3 stars: 0 (0%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
R
Robert

The best mailbox I ever seen. I’m glad I purchased it well worth the money. I bought the one in eight steal one. They also make a quarter inch steel one.

G
GARY K.

The Fort Knox mailbox is a solidly built unit with a smooth-opening door and a durable paint finish.

J
James H.

It is strong as they say! Good powder coat black finish should last a long time in our GIG HARBOR,WA environment.

A
Anonymous

Love our new mailbox!!

S
Steven A.D.

Well made and looks great. Feel secure in knowing my mail is safe until I choose to remove it. Thanks for the quality product and keep up the good work.

N
Nancy D.
Review

Greetings!

We just received our beautiful mailbox and want to thank you for it.
The packing was amazing; it arrived in perfect shape and it’s nice
that you put your logo on the back of the mail box.

Well done!
Nancy D.

L
Leonard R.

Simply Awesome 😎!

R
Randy
Review

Hello,
Could tell the quality was high simply when unpackaging the items. Your attention to detail to get it here unscratched and quality packaging was tops.
Really Happy with the mailbox and custom address post also.

E
Ernie &.L.(.S.
Review

To the fine folks at Fortknoxmailbox, we received our M1-LT today and wow, just wow. It is a thing of beauty. Tough, sturdy. sleek and good to look at. We are so excited to have secure mail once again! Thank you so much for the high quality product. We will be sure to recommend your company and products to our friends. Thanks again!

J
Jennifer P.
Review

I (for my company) purchased one of your mailboxes 9 years ago due to it constantly being broken into, once a week at least … it took 9 years of thieves attempting to pry it open before they decided to just take the whole thing! It’s a testament to your product that they had to resort to taking it (we did have it attached to a base we thought was heavy enough) – but we didn’t have the post before! I am confident that we’ll get that long or longer this time around since we’re putting it in the ground properly. I came right back to you guys for the replacement, thank you for your great mailboxes!

E
Eric W.
Review

Just received the mailbox today and couldn't wait to replace the old one. Man oh man, do you make a slick looking product. Class act! Even though I bought the light version, I was impressed as heck that my arms got a little tired walking the new box out to the mail station to bolt it in place. I absolutely love it! Thanks for making a great product and for your terrific folks there.

D
Deborah
Review

We have a Fort Knox mailbox on a pole by the road. It was hit by a speeding car which sent the box flying more than thirty feet. The new Corvette had significant damage. The pole was snapped and went flying. My box didn't have a dent. We were able to reattach it with a bigger post and we are good to go

T
Todd
Review

Hello,
Just wanted to share a couple pics of Mr. Davis’s new mailboxes.
These boxes are very nice!
Thanks,

J
Jordan B.
Review

Wonderful company - expert packing, quick shipping, and highest quality products!!
Jordan B. Kent, WA

J
John D.
Review

Somebody tried to steal my mailbox last week. They started by ramming into it with a pickup truck & managed only a small dent in the stand, but a big dent in their truck. Next, they used a cargo strap to wrap around it to pull it out of the ground, & the cement finally gave way. The beauty of this incident is that, by that time, my dogs started barking & it chased them away. We kept the nearly new cargo strap!
The mailbox looks a little worse for wear & I have to get new numbers, but I'm glad I still have a mailbox!
Thanks for best built mailbox ever!

T
Tim T.
Review

Thanks for the quality American made product.
Tim T.

M
Mandy E.
Review

We installed this product because many mail boxes in our area have been broken into. No more of that.

J
Jon H.
Review

Strong box, could shoot though it. - If you are worried about that, then go with the 1/4 steel option.
Jon H.

B
Bob S.
Review

If you want security, don't bother with any other brands. Made in Oregon.

T
Traintech86
Review

I researched all security mailboxes. Look no further.

I bought this basic model. It is 1/8 inch steel. The other models have 1/4 inch steel.

I installed it myself, with little difficulty.

Worth every penny. Sales staff was pleasant on the phone.

Made in Oregon with quality materials.

C
Caangie
Review

There was a rash of mail theft in our city. We bought a locking box from the local home improvement store and thought it was handled. Our mail box got broken into 3 times over a 2 week period. At this point, I went on a mission. I went through so of these boxes here on amazon. I found a 5 star review titled "Lasted One Week". I asked myself why someone would give a perfect review for something that lasted one week. After reading he hit it with a Cat excavator, I knew this is the box for us. We got the mail box, nearly put out our backs moving it around but when you open the box, you are not disappointed:

Caangie

A
Alexa M.
Review

We saw this mailbox in our neighborhood. It was more sturdy 1/8 inch steel (38 lbs.) and not quite as large as some other locked mailboxes. If you have the company put the house number on the box it’s non refundable, but they did a really nice job. The lock is low profile and would be extremely difficult to pry open. The reason why the box received only 4 stars is because the hardware to mount box is not included. We knew that, but for the price we paid, it should be. The other reason for the 4 star rating is Amazon had a $30 discount when I went to purchase. However, I received an email from the company saying they can’t comply with the shipping date and to cancel the order. Then they would send a link to reorder it. Of course, when I did that, no more $30 discount. I questioned the company and also Amazon, but neither could give me that discount. Amazon rep said you could cancel order again and try to reorder where it shows the $30 discount. We thought it’s becoming a hassle so dropped it. It almost seemed like a bait and switch. Alas, happy with the mailbox. The name of the company I purchased box through Amazon was MBBB Trading.
Alexa M.

S
Sue M.
Review

I don't write a whole lot of reviews, but this was my best Amazon experience ever, and I use Amazon a lot! Great price, lightning fast shipping, responsive and courteous seller!

I have a house across from the beach with a public road and boardwalk between us and the water. A lot of pedestrian and car traffic. Everyone's mailboxes are on the road and recently they all got broken into. Not the first time this has happened. Last time I bought a $50 security locking mailbox from the hardware store for deterrence. That didn't work because this time they just pried the lock and door straight off and took my mail (including an Amazon package)! Same with the neighbors. I decided to play hardball and go for the beefiest mailbox I could find without breaking the bank and decided on the Fort Knox M1-LT.

The mailbox was more than $20 cheaper with this seller on Amazon than anywhere else I could find (even factoring in the shipping). I was skeptical because the price was so good, but took the chance anyway and made the purchase. I contacted UbeatableSale via Amazon asking if they could send my street numbers too and they said yes. The mailbox arrived in 3 days, more than a week before the earliest estimated delivery date and with my street numbers already professionally installed on it! This thing is the genuine article, 35 lbs of solid welded steel and safe-style lock. Indestructible.

Some neighbors and I have a bank of mailboxes that sit on two 2x4s bolted onto the outside of a 4x4 post at each end of the span. I just mounted the box with some lag bolts and washers I already had and it fit perfectly. I couldn't be happier with this product or seller!

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Lisa &.T.P.
Review

Secure mailbox thieves can't reach in to.
Finish on top had many imperfections for a product with high claims and price.
Is Amazon getting the Fort Knox seconds ?

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Gollum M.
Review

Best security mailbox Ive ever had. Beats any of the other security mailboxes by a long shot. If you are considering paying 100-200 dollars on a security mailbox, this one is the only one to get. The other ones are still easily broken into if a thief really wants to get your mail. This mailbox prevents any kind of prying or bending of the metal, its too thick to bend easily. I can sleep very good at night with this mailbox. The only way someone is going to get my mail is if they take the post out of the ground.

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Raymond T.
Review

Fantastic mailbox. Very stout, made of quarter inch metal material. Lock works great. Mail slot allows delivery of mail and prevents theft. Slot is designed to prevent people from sticking their hand into the mailbox. I would recommend this product. Although it cost a little more than what is offered at Lowes and Home Depot, the quality construction of this mailbox is second to none. It should be the last mailbox you will ever need.

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Laura G.
Review

We love our Fort Knox Mailbox! The owners are great to work with. We appreciate that our mail is secure, even when we can’t pick it up for days. Great purchase, would definitely recommend.

C
Casey S.
Review

Great mailboxes and service!

T
Tawny S.
Review

In this day and age of sketchy customer service this company is hands-down one of the best ever worked with.
Submitting an incorrect key code for new mailbox keys I was contacted by phone and email by Abigail. Thankfully, I was able to email her and the keys arrived before I knew it (days sooner than I expected).
Thank you to ALL involved you ROCK!!

T
Tony K.
Review

Nuttin better than a Fort Knox Mailbox. Neighbors are jealous.