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Roadside Locking Mailbox

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.

  • 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

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Roadside Locking Mailbox - H4325
Roadside Locking Mailbox are a secure way to ensure that your mail will be safe and sound. These..
Wholesale Price:
$123.50
Newspaper Holder - H4315
Newspaper holder for use with Mail Chest mailboxes and Roadside mailboxes. Attaches between the mai..
Wholesale Price:
$58.50
Pedestal - In-Ground Mounted for Mailbox - H4385
In-Ground Mounted Pedestal for Mailboxes Unit Size: 3-1/2"W x 3-1/2"D x 48"HTop: 6"W x 12"DColors: ..
Wholesale Price:
$96.50
Pedestal - Bolt Mounted for Mailbox - H4365
Bolt mounted pedestal for mailboxes 3-1/2"W x 3-1/2"D x 32"Htop & base: 6"W x 12"DColor: Black, ..
Wholesale Price:
$96.50
Deluxe Post For 1 Roadside Mailbox - H4370
Single sided deluxe in-ground post for mounting 1 Roadside Mailbox. Size: 25"W x 81"H x 4"D Weig..
Wholesale Price:
$146.50
Deluxe Post For 2 Roadside Mailboxes - H4372
Double sided deluxe in-ground post for mounting 2 Roadside Mailboxes. Size: 35"W x 81"H x 4"D We..
Wholesale Price:
$171.50
Deluxe Post For 3 Roadside Mailboxes - H4373
Double sided deluxe in-ground post for mounting 3 Roadside Mailboxes. Size: 49"W x 81"H x 4"D We..
Wholesale Price:
$196.50
Deluxe Post For 4 Roadside Mailboxes - H4374
Double sided deluxe in-ground post for mounting 4 Roadside Mailboxes. Size: 63"W x 81"H x 4"D We..
Wholesale Price:
$221.50
Two Wide Spreader Plate for Mailbox - H4382
Two wide spreader plate mounts 2 mailboxes to one pedestal Size: 34"W x 1"H x 9"D Weight: 15 lbs..
Wholesale Price:
$58.50
Three Wide Spreader Plate for Mailbox - H4383
Three wide spreader plate mounts 3 mailboxes to one pedestal Size: 55"W x 1"H x 9"D Weight: 15 l..
Wholesale Price:
$68.50
Four Wide Spreader Plate for Mailbox - H4384
Four wide spreader plate mounts 4 mailboxes to one pedestal Size: 63-1/2"W x 1"H x 9"D Weight: 3..
Wholesale Price:
$88.50
Pedestal Mounting Kit - H4394
Pedestal mounting kit for Mail Package Drop mailboxesIncludes J-bolts, nuts, and washersFor new ceme..
Wholesale Price:
$24.50
Standard Replacement Lock Set - H4390
Standard replacement lock set includes 2 locks keyed alikeFor Mail Package Drop mailboxesIncludes 2 ..
Wholesale Price:
$19.50
Non-locking Thumb Latch - H4388
Optional Non-Locking Thumb Latch..
Wholesale Price:
$9.95
Replacement Flag - H4316
Replacement flagSize: 2-3/4"W x 8"H..
Wholesale Price:
$9.95
Custom Engraved Placards - H4367
Custom Engraved PlacardsSize: 8-1/2"W x 2"H ..
Wholesale Price:
$14.95

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.