4C Series Horizontal Wall Mount Mailboxes

The NEW 4C Series Horizontal Wall Mount Mailboxes offered and manufactured by National Mailboxes are now required and mandatory for ALL new construction and major renovation wall mount installations according to the U.S Postal Service. This new postal regulation and requirement is for all U.S mail delivery in the USA. The new (USPS Approved) 4C Horizontal Mailboxes are high security type and front loading style with larger tenant compartments for more mail capacity, equipped with parcel locker compartments for packages and include outgoing mail compartments for outgoing mail. Standard models are recessed in-wall mount style and optional surface mount collar enclosures are available for surface wall mounting. All tenant locks and keys are included and a wide selection of protective finish colors are offered. Optional private master locks for private use/access delivery are available upon request. Learn More
For more product info contact the National Mailboxes Customer Support Center at 1-800-676-5161

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1 to 7 Tenant Doors 4C Series Horizontal Wall Mount Mailboxes – NEW High Security - USPS Approved For All Wall Mount Installs (43)
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8 to 15 Tenant Doors 4C Series Horizontal Wall Mount Mailboxes – NEW High Security - USPS Approved For All Wall Mount Installs (39)
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16 to 29 Tenant Doors 4C Series Horizontal Wall Mount Mailboxes – NEW High Security - USPS Approved For All Wall Mount Installs (16)
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NEW 4C Series Horizontal Wall Mount Parcel Lockers - For Packages Only - High Security - USPS Approved For All Wall Mount Installs (19)
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NEW 4C Series Horizontal Wall Mount Collection Drop Boxes – High Security - USPS Approved For All Wall Mount Installs (9)
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NEW 4C Series Horizontal Wall Mount Trash and Recycling Collection Bin Units (9)
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Freestanding Depot Enclosure with 4C Series Horizontal Mailboxes (High Security Type) Local USPS Approval Required (75)
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Surface Mount Collar Enclosures for 4C Series Horizontal Mailboxes (Required for Surface Wall Mounting) (22)
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4C Horizontal Mailbox Accessories & Replacement Parts (24)
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Outdoor 4C Horizontal Mailbox Shelter Pavilions (12)
Downloads:
– 4C Horizontal Mailboxes Product Line Information
– 4C Horizontal Mailboxes Installation Manual
– 4C Surface Mount Collar Enclosure Installation Manual
– Accessibility Installation References and ADA Requirements
– 4C Horizontal Mailboxes Maintenance Manual
– U.S. Postal Service STD-4C Specification Highlights
Product Overview: STD-4C Front Load Series:

Product Overview: STD-4C Surface Mount Series:

Product Line Features:
- USPS Approved and Postal Certified for US Mail Delivery
- Front Loading Horizontal Type
- Tenant Locks and 3 Keys per Door Included in Prices
- New 4C Series High Security (Mandatory & Required for New Construction & Major Renovation Wall Mount Installs)
- USPS Approved and Postal Certified for All Wall Mount Installations
- 4C Wall Mount Horizontal Type: Both Recessed In-Wall Mount Style and Surface Wall Mount Style are Available (Optional Surface Mount Collars Sold Separately for Surface Wall Mounting Applications)
- Constructed and Manufactured of Heavy Duty Aluminum and Stainless Steel for Extended Life
- Tenant Locks and Keys Included (3-Keys per Door or Lock are Included)
- For Installing Multiple Units 4C Connector Kits are Included Allowing for Fast, Easy & Secure Installation
- Wide Selection of Special Protective and Attractive Powder Coated Finish Colors to Choose From
- Includes Self-Adhesive Aluminum Number Plates for Door Identification (Custom Engraved Numbering also Available)
- FREE Shipping/Freight (Via Truck) Promotional This Month – Expires Month End
4C Horizontal Mailboxes (Wall Mount Style)
National Mailboxes new 4C series horizontal wall-mount mailboxes are now considered mandatory for ALL new construction and major renovation wall mount installations according to the U.S Postal Service which is a new postal regulation and postal requirement. (If for USPS use/access-aka U.S Mail Delivery) For not adhering to this regulation and requirement Local Postmaster Approval would then be required.
National Mailboxes offers a huge selection of the new 4C series horizontal mailboxes for both USPS use-access-(USPS Approved) as well as for private use-access applications. Both a full line of recessed in-wall mount style and surface wall mount style 4C mailbox models are available and offered at wholesale prices only at National Mailboxes. A wide range of door configurations are also available, ranging anywhere from one tenant door models all the way up to a 29-tenant door models serving the postal and mail delivery needs of millions of businesses and industries throughout North America. With our full product line of commercial 4C horizontal mailboxes each model comes with one outgoing mail compartment for outgoing mail as well as many models are equipped with parcel locker compartments for packages which is a new postal regulation and requirement.
With the highest 4C security offered in the mailbox industry there isn’t a higher security commercial mailbox out there in the U.S marketplace today then National Mailboxes full line of 4C horizontal mailboxes which are tamper resistant, tamper proof and theft resistant and include heavy duty sophisticated tenant locking systems for added security and mail protection.
Rated and approved for both indoor and outdoor use these high quality 4C horizontal mailboxes are weather resistant, corrosion resistant and rust proof offering additional decades of extended life. Manufactured and made out of heavy duty aluminum and stainless steel material these 4C horizontal mailboxes will stand up to the harshest outdoor weather conditions year after year.
Product Design & Security Features Of Our 4CMailboxes


4C Horizontal Mailbox Use and Regulations
As of 2006, all new construction, new mailbox applications, and major renovation sites using centralized wall-mounted USPS mail delivery are required to use a 4C mailbox system. To follow the USPS installation requirements, your 4C Mailbox system should not exceed 67″ from the finished floor to the top row of locks, and must be at least 28″ from the finished floor to the bottom of the lowest tenant compartment. An exception can be made and this dimension can be minimized as low as 15″ if the lower compartments are 4C Mailbox Parcel Lockers.
Parcel Locker Requirements
The USPS requires at least one Parcel Locker for every 10 mailbox compartments. So, if your project requires 100 mailboxes then you will need at least 10 parcel lockers with a minimum size of 15″H x 12″W x 15″D. With the rise in online retail and package delivery we recommend having at least one Parcel Locker for every 6 mailboxes. If the mailbox installation exceeds the 1:10 requirement then smaller parcel lockers may also be used. Shop 4C Parcel Lockers.
4C Horizontal Wall Mount Mailbox Color Options
Customize your 4C Mailbox installation from National Mailboxes with one of eight different architectural color options. All colors come in a durable powder coat finish to provide many years of reliable service. Available colors include Antique Bronze, Black, Dark Bronze, Gold, Postal Grey, Sandstone, Silver Speck, and White. Colors shown below may vary slightly due to variance in computer monitors. Pantone color numbers shown in parenthesis are for reference purposes only. Color availability may change without notice.
Door Identification Options
Decals: All 4C modules come standard with silver adhesive decals which are 1-1/2″H x 1-3/4″W. Black lettering can contain up to five characters (alpha and/or numeric) per decal.

Engraving: Custom engraving uses the USPS Standard US Block font and is 3/4″ tall. All engraving can include up to 12 characters on one or two lines.

PLEASE NOTE: New 4C Horizontal Mailboxes are USPS Approved & Postal Certified and are Now Mandatory for All New Construction and Major Renovation Wall-Mount Installations According to the U.S Postal Service (If for USPS Use/Access-Direct US Mail Delivery) New Postal Requirement-Regulation
Additional Information:
- 4C Horizontal Mailboxes – USPS Approved and STD-4C Compliant
- Choosing Centralized Mailboxes that Comply with the US Postal Service Regulations
- Accessibility Installation References and ADA Requirements
- Shop all Commercial Mailboxes from National Mailboxes




















