Fort Knox Mailboxes are Indestructible
We built our company with one thing in mind: to build a box that thieves can't ever break into. By focusing on each component — the steel, the welding, the hinges, the doors, the locks, and the mail slot — we created the industry's toughest, most secure mailboxes.
Our Steel
Our mailboxes are made from ¼” steel. This is industrial, or structural steel, which is used to make buildings and bridges. It’s super thick, built to last, and the long-term solution to thinner locking mailboxes. This solid steel shell will withstand bats, rocks, sledgehammers, mailbox bombs, and vehicles!
All Fort Knox Mailboxes are hand-welded—no spot welds or rivets. All back plates, hinges, doors, and parts are fully welded.
Our Doors
We know the most common way of getting into a traditional locking mailbox is by prying open the door. Our doors are all recessed to eliminate pry points. They’re 3/16” steel with a 2” continuous hinge and reinforced with angle-iron welded to the door.
Our Mailslots
Incoming mail slots are 1.75” tall to meet USPS requirements and deter reach-ins. A 7" interior shelf also helps prevent fishing attempts.
Our Locks
7-pin tubular lock standard (vending-machine grade). Upgrades available: hardened steel, vault locks, slam locks, and double-locked options.
7 PIN Tumbler lock
Medeco® Cam Lock
Slam lock
The Vault lock extreme
Our Flags
If you order a mailbox with a flag, the steel quality matches the mailbox—tough.
- The Bunker: 1/8” steel flag
- Small Standard: 3/16” steel flag
- All others: 1/4” steel flag
Our Posts
Posts (sold separately) bolt from underneath with carriage bolts. 10-gauge square tubing (≈ 1/8”). In-ground posts set ~2 ft with cement.
Sand Blasting and Powder-Coating
Mailboxes are sand-blasted clean, preheated, powder-coated with electrostatic bonding, then oven-cured at ~400°F. This finish is built for the elements.
Custom colors: RAL color chart
Final Inspection & Packaging
Every mailbox is inspected by hand. Locks installed, numbers affixed, accessories added, then packaged with high-density foam, double-corrugated cardboard, tape, and strapping.
Shipping
Under 150 lbs ship via UPS. Heavier units and multi-box orders ship freight on a pallet.