Fort Knox Small Standard Mailbox – Mailbox Big Box
Mailbox Big Box


(503) 339-3163 |

Fort Knox Small Standard Mailbox



The maximum security locking mailbox that started it all. The Fort Knox small standard is 68 pounds of solid steel, tough enough to stop the most determined mail thief.


The Fort Knox small standard which will hold approximately 1 week of mail. If you travel frequently you should look at the large standard here which will give you 2 weeks of mail storage. 


Both the Fort Knox small standard and large standard mailboxes are built to the same specifications. 


If mail security is your number one priority when choosing a mailbox. Look no further than the famous Fort Knox Mailboxes - commonly referred to as a safe mounted on a post!


Our Fort Knox Small Standard mailbox has an anti-fishing measure with nearly 6 inches of metal extension shelf at the incoming mail slot so if someone were to try and put a “fishing line” down into the box to grab the mail, the mail would catch on the extension shelf, drop back down, and would not come out of the incoming mail slot.


Shop with confidence as Mailbox Big Box proudly offers the lowest prices available anywhere on all Fort Knox Mailboxes




  • 1 week of mail storage
  • 2 high-security tubular keys
  • 7 pin tubular lock
  • Hand welded 1/4" steel shell and 3/16" reinforced steel doors
  • Accepts small parcels
  • Powder coated inside and out for durability
  • Free address numbers for the front door




  • Can be installed in masonry applications, a breakaway post, and other post materials 
  • Pre-drilled for the Small Standard Fort Knox in-ground post
  • Post can be installed using a cement pour




  • Powder coated red mail flag
  • 57" steel in-ground post - install using a concrete pour
  • Newspaper box - comes pre-welded to the post
  • High-security slam lock for locked up packages with 2 keys


When you are expecting a parcel, leave the door slightly open and the parcel carrier can put the parcel inside, close the door firmly - locking it until you are ready to collect it.


  • The small standard is highly customizable with rear door access, extra keys, mail trays and more. Use the chat window below to let us know what additional options you need. 




  • Length 21"
  • Width 10"
  • Height 10" 



Mounting Holes Dimensions

  • Square shaped
  • 1/2" holes
  • 5 - 3/4" apart (appx) 




About Fort Knox Mailboxes




Non-customized order - Dispatches in 3 - 5 working days
Customized order - Dispatches in 7 - 10 working days