Salsbury 3700 Series Recessed Mounted 4C Horizontal Mailboxes - Front Loading - U.S.P.S. Access
- Recessed Mounted 4C Horizontal Mailboxes are U.S.P.S. Approved
- Manufactured by Salsbury Industries to USPS-STD-4C Specifications
- Ideal for apartments, commercial buildings and residential developments
- Required for new construction and major renovations
- For indoor or outdoor use
- Constructed of heavy duty aluminum and stainless steel hardware
- Standard height units feature a durable powder coated finish available in aluminum, bronze, sandstone and black
- Doors include a heavy duty cam lock with a dust/rain shield and 3 keys
- MB1 doors are 3-1/4" H x 12-3/4” W, MB2 doors are 6-3/4" H x 12-3/4” W, MB3 doors are 10-1/4" H x 12-3/4” W and MB4 doors are 13-3/4" H x 12-3/4” W
- Standard height units are available in four (4) popular heights – 6 Door High, 10 Door High, 11 Door High and Maximum Height - and a variety of configurations to meet your requirements
- Custom units are available in additional configurations and colors
- Available in configurations that are 1 door wide (single column) and 2 doors wide (double column)
- U.S.P.S. standard 4C requires a minimum of 1 parcel locker for every 5 tenant compartments
- Fully integrated and stand-alone parcel lockers are available in varying sizes: PL3 (10-1/4" H), PL4 (13-3/4" H), PL4.5 (15-1/2" H), PL5 (17-1/4" H) and PL6 (20-3/4" H)
- Units include a compartment for outgoing mail collection and is labeled “Outgoing Mail”
- Outgoing mail compartment / carrier access door includes the U.S.P.S. master lock access door (lock installed by the U.S.P.S.) and cannot be used for mail distribution
- Outgoing mail compartment includes a 11-3/4” W x 3/4” H mail slot and weather protection hood
- Include factory installed 1” W x 1/4” D trim and a solid rear cover
- Include a 4C horizontal mailbox connector kit to easily connect multiple recessed mounted 4C horizontal mailbox units (hardware included)
- ADA height compliant units available - ADA compliance guidelines
- Salsbury Industries is ISO 9001:2015 certified and has excelled in the field of manufacturing since 1936
- Custom engraved placards
- Custom engraved doors - regular
- Custom engraved doors - black filled
- Replacement locks
- Additional keys
- Key blanks
- More Product Information
- Product Configurations
- Installation Instructions
- Technical Drawing
- BIM Models
- ADA Compliant Units
4C Standard Horizontal Mailbox Video
Installation Video – Installing 4C Mailboxes
Installation Video – Tenant Lock Replacement
Installation Video – Tenant Door Replacement
Installation Video – Locating Tenant Keys
Need a bulk or custom order?
Want to pay by check or ACH?
Need help with USPS/ADA regulations?
Need some more information about a product?
Not sure what mailbox you need?
Just send us a picture of your current mailbox or your future design plan and we’ll help you find the right product.
Free Standard Engraving/Hard Sticker
Free Standard Shipping
Expedited Shipping on Select Products
No Hidden Fees
- Choosing a selection results in a full page refresh.
- Press the space key then arrow keys to make a selection.