Roadside Locking Mailbox (USPS Approved)

Made entirely of aluminum, National Mailboxes U.S.P.S. approved H4300 series roadside residential mailboxes feature both a front and rear access locking door. Available in a black, green, silver or white powder coated finish.

  • USPS approved
  • Each unit includes an outgoing mail tray, a lock with two keys on each door (keyed alike) and an adjustable red signal flag. Mail is deposited through a non-locking access panel on the front
  • Roadside mailboxes are approved for U.S.P.S. curbside mail delivery.
  • Unit size: 12 1/2″W x 13 5/8″H x 18 1/4″D (Installed height w/ pedestal: 45.5″)
  • Mail deposit opening size: 10″W x 1 3/4″H
  • Includes outgoing mail tray
  • For a larger version of this product, see mail chests.

Contact our customer service center for more product information at 1-800-676-5161

  USPS Approved

Learn More About 4300 Series Roadside Mailboxes

Showing 1–12 of 16 results

Showing 1–12 of 16 results

H4382 & H4383 SPREADERS: Made of heavy duty aluminum, National Mailboxes spreaders are an ideal way to mount multiple roadside mailboxes to pedestals. Optional two-wide (H4382) and three-wide (H4383) spreaders easily attach to standard pedestals (H4365 and H4385). Roadside mailboxes can also be mounted in groups using the two-sided deluxe posts (H4380).

H4315 NEWSPAPER HOLDERS: Made of heavy duty aluminum, National Mailboxes newspaper holders are a unique option for roadside mailboxes. Each unit has a solid back and includes mounting hardware to easily attach to the bottom of roadside mailboxes and to the top of pedestals and spreaders. Newspaper holders feature a durable powder coated finish available in four contemporary colors.

  • H4365 BOLT-MOUNTED PEDESTAL (SOLD SEPARATELY)
  • H4385 IN-GROUND MOUNTED PEDESTAL (SOLD SEPARATELY)
  • H4370 IN-GROUND MOUNTED DELUXE POST (SOLD SEPARATELY)
  • H4372 IN-GROUND MOUNTED DELUXE POST (SOLD SEPARATELY)

Roadside mailboxes can be mounted on the optional bolt mounted (H4365) or inground mounted (H4385) aluminum pedestals, in-ground mounted deluxe posts (H4370 and H4372) or a base of your choice. Roadside mailboxes can also be mounted in columns, masonry or walls.

H4388 NON-LOCKING THUMB LATCHES: Non-locking thumb latches (H4388) are available as an option upon request.

H4316 REPLACEMENT FLAGS: Made of heavy duty aluminum, mail chest replacement signal flags have a durable red powder coated finish and include stainless steel mounting hardware.

H4367 CUSTOM ENGRAVED PLACARDS: 8-1/2” W x 2” H custom engraved self-adhesive placards are available as an option upon request.