The Vault Series
1/4″ Steel Anti-Theft Package Mailboxes

Name: Vault Series - The Leading Anti Theft Mailbox for Robust Protection | Fort Knox Mailbox
Brand: Fort Knox Mailbox
SKU: 784300872061
Availability: InStock
Rating: 5.00 (4 reviews)

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The Vault Series
1/4″ Steel Anti-Theft Package Mailboxes

Rated 5.00 out of 5 based on 4 customer ratings

(4 customer reviews)

From: Original price was: $1,795.00.Current price is: $1,499.00.

POWDER COATING COLOR * *

Vault Size * *

Clear

Is your location a Business or Commercial property? *

Do you have a forklift or loading dock? *

Optional Locks

Add a Flag and Outgoing Mail

Add a Rear Door

Steel Post for the Vault, XL & XXL Vault Mailboxes

Add for $179.00

Heavy Duty Steel T-Post for XXXL Vault Mailbox

Add for $375.00

Built Like a Vault—Because It Is One

The Vault Series is the ultimate in mail and package security. Made from ¼” steel, with hand-welded seams, recessed doors, and zero pry points, these units are designed to withstand the toughest conditions. What sets them apart? The fully enclosed baffle system up top means no mail slot, no fishing. Each Vault comes standard with our Vault Lock: two internal steel locking pins and a front lock for double-locking protection with the free lock upgrade the Vault Lock Extreme with Medeco Lock.

These are serious, all-steel solutions for both residential and commercial use, built to guard your mail and packages for decades.

Why Customers Love the Vault

With four available sizes, the Vault is a favorite for travelers, snowbirds, and anyone tired of mailbox compromises. It holds large volumes of mail and packages in one secure compartment—no need to open a separate lock every day. Go days or even weeks without checking in, and know your items are safe.

Need a custom size? We build those too. Contact us to start the conversation.

Meets all USPS Requirements

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Categories: Secure Package Receptacles, Heavy Duty Locking Mailboxes, All Products

Description

This is How It Works!

The mail carrier will pull down on the handle, place your mail and packages inside the baffle door. As the mail carrier closes the door, the mail and packages fall into the locked compartment. You are the only one with a key!

There are 4 different sizes of Vaults available:

Vault (12” W x 24” H x 23” D ; 170 lbs) – $1,499
- Accepts a 3” tall package
Vault XL (12” W x 36” H x 24” D ; 225 lbs) – $1,899
- Accepts a 6” tall package
Vault XXL (18” W x 36” H x 24” D ; 325 lbs) – $2,199
- Accepts a 6” tall package
Vault XXXL (24” W x 36” H x 24 D : 400 lbs) – $2,499
- Accepts a 6” tall package

Custom sizing is also available. Please call 1-800-206-8067 or message us to discuss.

Mounting

The Vault is pre-drilled on the bottom.

Vault, Vault XL and Vault XXL all have 4 holes, 6 ¾” apart, and designed to fit our Large Posts. The height of these posts is custom cut to accommodate the taller heights of the Vault Mailboxes:
- Vault Mailbox: 57” In Ground Post
- Vault XL and Vault XXL: 50” In Ground Post
- Vault XXXL: 50” In Ground T-Post
The Vault XXXL has 8 holes and is designed to fit our Large T-Post. This T-Post is needed to accommodate the weight of the Vault XXXL.
Surface Mount Posts are also available.

The Vault comes with our amazing, high-performance powder-coating finish to combat all the elements.

Special Features for the Vault Series Mailbox:

170-400 lbs. of steel! (Vaults Only)
1/4″ thick steel shell
3/16″ thick reinforced steel doors
2″ continuous welded steel hinge
All hand-welded design (no spot welds or rivets)
Vault Lock EXTREME with Medeco Lock and 2 keys ($99 value INCLUDED!)
Brushed satin nickel pull
High performance powder coating inside and out
- Standard Colors (Slate Gray or Glossy Black)
- Any custom solid powder coating color available (+$169 per order)
  - View an online color chart
Free 1-3/4″ vinyl adhesive address numbers for the front door
Pre-drilled for mounting on our steel posts or racks
- Can be installed on a break-away (surface mount) post, on most surfaces with pre-drilled holes, or encased in masonry
- Add a matching in-ground steel post (5″ x 5″ x 50″)
  - For the Vault, Vault XL and Vault XXL
- Add a matching in-ground steel T-post (5″ x 5″ x 50″)
  - For the Vault XXXL
- Surface mount (break-away) posts available

The Vault can accept packages 3″ H x 10″ W x 10″ D
The Vault XL can accept packages 6″ H x 10″ W x 10″D
The Vault XXL can accept packages 6″ H x 16″ W x 10″ D
The Vault XXXL can accept packages 6″ H x 22″ W x 10″ D
Can be custom adjusted and upgraded:
- Add the flag and outgoing section
  - When the outgoing section is added, a small 1 1/4″ slot is added at the top inside of the box
Curb Mounted (for installation on an existing sidewalk)
Ground Level (for installing at ground level)
*Rear Door access available for an additional cost (3 options, same price)
- Front and rear doors keyed alike
  - The front and rear doors would have the Vault Lock Extreme with Medeco Lock and 4 keys
- Front fake door and fake lock. The door is welded shut on the inside
- No front door. It is replaced with a steel plate completely welded

Additional information

POWDER COATING COLOR *	Glossy Black , Slate Gray , Custom Color + $169 (contact us for desired color)
Vault Size *	Vault Mailbox (12" W X 24" H X 23" D) -$1,499 , Vault Mailbox XL (12" W X 36" H X 24" D) – $1,899 , Vault Mailbox XXL (18" W X 36" H X 24" D) – $2,199 , Vault Mailbox XXXL (24" W X 36" H X 24" D) – $2,499

Weight	170 lbs
Dimensions	23 × 24 × 12 in
POWDER COATING COLOR *	Glossy Black , Slate Gray , Custom Color + $169 (contact us for desired color)
Vault Size *	Vault Mailbox (12" W X 24" H X 23" D) – $1,499 , Vault Mailbox XL (12" W X 36" H X 24" D) – $1,899 , Vault Mailbox XXL (18" W X 36" H X 24" D) – $2,199 , Vault Mailbox XXXL (24" W X 36" H X 24" D) – $2,499

Steel Post for the Vault, XL & XXL Vault Mailboxes

Weight	50 lbs
Dimensions	57 × 5 × 5 in
Size	In-Ground Post (Dirt Install) , Make Post Surface Mount (Sidewalk Install)
For which Mailbox	For the Vault , For the Vault XL , For the Vault XXL

Heavy Duty Steel T-Post for XXXL Vault Mailbox

Weight	55 lbs
Dimensions	59.5 × 11.5 × 23.5 in

Reviews (4)

4 reviews for The Vault Series
1/4″ Steel Anti-Theft Package Mailboxes

Mike P. – March 1, 2025

Rated 5 out of 5
The mailbox finally arrived yesterday afternoon. We will be installing it today. Thanks for all your help. We are pleased with how strongly it is built and should last us for many years.
Laura and Darryl G. – March 10, 2025

Rated 5 out of 5
Thanks for the mailbox! We are relieved that our mail will be safe. We appreciate the quality made box and the professional install.
Kendra S. – March 27, 2025

Rated 5 out of 5
Received the mailbox yesterday and looks great!

Thanks so much for all your help!!

Can’t wait to set it up and start using it
Tom W – April 16, 2025

Rated 5 out of 5
I had second thoughts spending 2.5K on a mailbox for the office but wow…… even the contractors were impressed with the quality. Using it already and no complaints.

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FAQ

Shipping Options

When Will Your Mailbox Ship?

We have a lot of different models and options, so our inventory is always fluctuating. We are currently very busy, and below are our average wait times. If your mailbox is in stock, it will ship the same or next business day. Otherwise, here are our average wait times if not in stock*:

10" Mailboxes (M1-LT & Small Standard): 1 week
12" Mailboxes (Large Standard and Fortress): 1-2 weeks
18" Mailboxes (Vacationer & Senator): 2-3 weeks
The Package Box, Vaults & CBUs: 2-4 weeks
Ballot Boxes: 4 weeks
Smaller accessories if shipping separate will ship the same or next business day
Custom work and custom Colors will add 1 week to the above time frames
Extra keys can take 10-12 days for delivery
FedEx Ground transportation: 1-5 Business Days
Freight transportation: 1-9 Business Days

*Larger quantities or custom orders will take longer. Feel free to contact us with a more precise shipping date.

All Products Ship USPS, FedEx or by Freight at no charge.

Fort Knox Mailbox, LLC. will choose the shipping method in which all items are shipped. Specified shipping by the customer can add a shipping cost.

All keys will ship via USPS priority. Expedited shipping is an option for a fee.

Our mailboxes, except for the Package Box, Vaults and our CBUs ship FedEx Ground.

If you order a quantity of 4 or more larger items (Mailboxes and Posts), your order will likely ship via Freight.

For freight shipments, if shipping to a business and/or have access to a forklift or loading dock, you can select this option for a discount. If selected, and shipping is not to a business or you do not have a forklift or loading dock, then Fort Knox Mailbox, LLC. can charge for the misinformation after delivery. Please make sure that the delivery information is correct.

Large Items & Larger Quantities Ship Freight

Please call us at (800)206-8067 or contact us here for all your shipping questions.

Order quantities of 4 or more mailboxes can ship freight depending on location and accessorials needed.

The T-Post for 3 generally ships either FedEx Ground or Freight. We will make the T-Post for 3 in two pieces (Not all welded together) and ship it FedEx ground to be securely bolted together at installation.

Locks & Keys ship USPS

All locks and keys ship free via USPS when ordered separately from a mailbox. Expedited shipping is available for an additional cost. Please Contact US for details and pricing.

The Vault Series
1/4″ Steel Anti-Theft Package Mailboxes

The Vault Series
1/4″ Steel Anti-Theft Package Mailboxes

Add a Flag and Outgoing Mail

Add a Rear Door

Steel Post for the Vault, XL & XXL Vault Mailboxes

Heavy Duty Steel T-Post for XXXL Vault Mailbox

Post Style