• Home
  • About
  • News
  • FAQ
  • Markets
  • Contact
Your only building supply source. Call: 1-855-373-5381
  • Create Account
  • Log In

Your Cart is Empty

We accept the following payments: Visa, American Express, Discover, MasterCard
USA Building Supplies
  • Mailboxes & Storage
    Commercial Mailboxes
    • Cluster Box Units
    • Pedestal Mailboxes-Single Unit Locking
    • 4C Horizontal Mailboxes
    • Horizontal Mailboxes
    • Vertical Mailboxes
    Drop Boxes & Postal Specialties
    • Collection Boxes
    • Letter Drop Boxes
    • Mail Slots & Drops
    • Package Drop Boxes
    • Postal Specialties
    MAILROOM PRODUCTS
    • Mail Sorters - Mailmaster
    • Console Mailroom Tables
    • STA Series Mailroom Tables
    • RMP Series Risers
    Storage Solutions for Electronic Devices
    • Cell Phone Lockers
    • Laptop Lockers
  • Division 10 Products
  • Matting Products
  • Site Amenities
Submit Project Specs & Plans Here

Search form

  • Horizontal Mailboxes

    • Rear Loading Horizontal Mailbox - 35 Incoming Mail Compartments
      view
    • Private Use Rear Loading Aluminum Mailboxes - 12 Tenant Doors
      view
    • USPS 4B+ Horizontal Mailbox - 7H x 5W Configuration
      view
    • Rear Loading Horizontal Mailbox - 28 Incoming Mail Compartments
      view
    • Private Use Rear Loading Aluminum Mailboxes - 8 Tenant Doors
      view
    • USPS 4B+ Horizontal Mailbox - 7H x 4W
      view
    • Rear Loading Horizontal Mailbox - 21 Incoming Mail Compartments
      view
    • Private Use Rear Loading Aluminum Mailboxes - 4 Tenant Doors
      view
    • USPS 4B+ Horizontal Mailbox - 7H x 3W Configuration
      view
    • Rear Loading Horizontal Mailbox - 30 Incoming Mail Compartments
      view
    • Private Use Rear Loading Aluminum Mailboxes - 2 Tenant Doors
      view
    • Private Use Rear Loading Aluminum Mailboxes - 1 Tenant Door
      view
    • USPS 4B+ Horizontal Mailbox - 6H x 5W Configuration
      view
    • Rear Loading Horizontal Mailbox - 24 Incoming Mail Compartments
      view
    • USPS 4B+ Horizontal Mailbox - 6H x 4W Configuration
      view
    • Private Use Rear Loading Aluminum Mailboxes - 2 Parcel Doors
      view
    • USPS 4B+ Horizontal Mailbox - 6H x 3W Configuration
      view
    • Rear Loading Horizontal Mailbox - 18 Incoming Mail Compartments
      view
    • Private Use Rear Loading Aluminum Mailboxes - 1 Parcel Door
      view
    • Rear Loading Horizontal Mailbox - 25 Incoming Mail Compartments
      view
    • Rear Loading Horizontal Mailbox - 20 Incoming Mail Compartments
      view
    • USPS 4B+ Horizontal Mail Receptacle - 5H x 5W Configuration
      view
    • Private Use Rear Loading Aluminum Mailboxes - 2 Doors With Slots
      view
    • USPS 4B+ Horizontal Mailbox - 5H x 4W Configuration
      view
    • Private Use Rear Loading Aluminum Mailbox - 1 Door With Slot
      view
    • Rack Ladder Installation System - Size: 61 7/8"H x 15 1/2"D
      view
    • Custom Rack Ladder
      view
    • Three Digit Single Dial Combination Lock (not available on 11"W x 6"H Doors)
      view
    • Custom Window Engraving
      view
    • Replacement 5 Pin Cam Lock With (2) Keys
      view
    • Custom Black Filled Door Engraving - 4 Character Maximum
      view
    • Custom Door Engraving - 4 Character Maximum
      view
    • Adhesive Sheet of Numbers for 2200 Series Mailboxes
      view
    • Tan Trim - for (3) Columns of Brass Mailboxes
      view
    • Key Blanks for Standard 2200 Series Locks - Box of 50
      view
    • Rear Cover for Entire Column of 2200 Series Aluminum Mailboxes
      view
    • Rear Loading Horizontal Mailbox - 15 Incoming Mail Compartments
      view
    • Combination Locks for 2200 Series Mailbox Tenant Doors
      view
    • USPS 4B+ Horizontal Mailbox - 5H x 3W
      view
    • Optional Rear Cover for SY-2280 & SY-2282
      view
    • Plastic Windows for 3 1/2"W x 5"H or 11"W x 6"H Door Size
      view
    • Plastic Windows for 5 1/2"W x 6"H Door Size
      view
    • Self Adhesive Numbers - Sheets of 100
      view
    • Label Holders - Packed and Sold in Sets of 50
      view
    • 3600 Series Horizontal Mailboxes
      Click Here to View Available Products

      Front Loading - Configuration: 7H x 5W (35 / 34 Useable)

      Front Loading - Configuration: 7H x 4W (28/ 27 Useable)

      Front Loading - Configuration: 6H x 5W (30/ 29 Useable)

      Front Loading - Configuration: 6H x 3W (18/ 17 Useable)

      Front Loading - Configuration: 5H x 4W (20/ 19 Useable)

      Front Loading - Configuration: 7H x 3W (21 / 20 Useable)

      Front Loading - Configuration: 6H x 4W (24/ 23 Useable)

      Front Loading - Configuration: 5H x 5W (25/ 24 Useable)

      Front Loading - Configuration: 5H x 3W (15/ 14 Useable)

    • Rack Ladder Horizontal Mailboxes
      Click Here to View Available Products

      Custom Rack Ladder

      2280 & SY-2282

      4 Character Maximum

      4 Character Maximum

      (100) Numbers Per Sheet

      Box of 50

      Optional Rear Cover for Entire Column of 2200 Series Aluminum Mailboxes

      Combination Locks for 2200 Series Mailbox Tenant Doors

      Size: 61 7/8"H x 15 1/2"D

      (2) Tenant Doors - Door Size: 10 3/4"W x 11 1/2"H

      (1) Tenant Door - Door Size: 22"W x 11 1/2"H

      (2) Parcel Doors - Door Size: 10 3/4"W x 11 1/2"H - Includes Private Parcel Release Lock

      (8) Tenant Doors - Door Size: 5 1/2"W x 5 1/2"H

      (4) Tenant Doors - Door Size: 10 3/4"W x 5 1/2"H

      (1) Parcel Door - Door Size: 22"W x 11 1/2"H - Includes Private Parcel Release Lock

      (2) Doors With Slots - Door Size: 11"W x 12"H - Both Slot Sizes: 9"W x 3/4"H

      (1) Door With Slot - Door Size: 22"W x 11 1/2"H - Slot Size: 16"W x 3/4"H

      (12) Tenant Doors - Door Size: 3 1/2"W x 5 1/2"H

    USPS Approved Horizontal Mailboxes

    All horizontal mailboxes are made of heavy duty aluminum and stainless steel hardware yielding a reliable mailbox. Horizontal mailboxes from USA Building Supplies can include custom engraving, number slots with perforated tag board inserts or plastic engraved tabs. Each tenant mailbox door is equipped with a secure lock providing mail security. Horizontal mailboxes are USPS 4B+ compliant and are available in a variety of module and door sizes to meet your requirements. Additional options for horizontal mailboxes include outgoing mail slots and parcel locker options. Horizontal mailboxes from USA BUilding Supplies offer an easy installation and are USPS approved for replacement projects only. USA Building Supplies offers the finishing touches your building needs. Horizontal mailboxes provide superior functionality for residential apartment buildings, office mail rooms, college dorms, government agencies, medical facilities and military bases serviced by USPS or private access applications. Horizontal mailboxes are front or rear loading and have a master access door or rear cover prepared for USPS provided arrow lock, or are equipped with a private lock depending on the application. Horizontal mailboxes which are prepared for the postal lock are USPS 4B+ compliant. USPS 4B+ compliant mailboxes are approved for replacement purposes only. Private use horizontal mailboxes along with our drop boxes and postal specialties are used for wide variety applications including corporate mail rooms, colleges, military installations and more.

    Horizontal Mailboxes with Outgoing Mail Slots

    Horizontal mailboxes are popular because of the wide variety of options they offer. USA Building Supplies offers a horizontal mailbox selection offers a wide variety of mailbox door sizes, providing you versatility in your mailbox configuration. Another common feature with horizontal mailboxes is having an oversized mailbox compartments with a slot designated for outgoing mail. Oversize doors are also commonly used as parcel lockers which prospective clients typically desire. A parcel locker allows the USPS or private individual (private use only) to deliver packages to your mail center.

    Shop the extensive line of locking mailboxes online now for high quality, secure storage solutions.

Shop Categories

  • Division 10 Products
  • Mailboxes and Storage
    • 3600 Series Horizontal Mailboxes
    • Rack Ladder Horizontal Mailboxes
  • Matting Products
  • Site Amenities

Need a Quote?

USA Building Supplies can put together a quote to meet your exact specifications and requirements.

Submit your Plans
Here
1.855.373.5381
    • Mailboxes & Storage
    • Division 10 Products
    • Matting Products
Helpful Resources:
  • Home
  • Related News
  • FAQ
  • Glossary
  • Company
  • Policies
  • Contact
Markets:
  • Mailing Supplies
  • Distribution Supplies
  • Building & Apartment Supplies
  • Warehouse Supplies
  • Facebook
  • Google+
Copyright 2020 ® All Rights Reserved