3700 Series Recessed 4C Mailbox with 3 Parcel Lockers

USPS-approved Salsbury 3700 Series recessed 4C horizontal mailbox built from heavy-duty aluminum with stainless steel hardware for indoor or outdoor use. This double-column, front-loading unit includes 15 tenant doors, an outgoing mail slot, and three integrated parcel lockers for secure package delivery.

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Key Features:

• USPS-STD-4C Compliant: Approved recessed, front-loading unit for new construction and major renovations.
• Durable Construction: Heavy-duty aluminum body with stainless steel hardware and powder-coated finish.
• Secure Access: Heavy-duty cam locks, carrier access master door, and anti-fish outgoing mail slot.
• Integrated Parcel Lockers: Three parcel lockers included to meet 1:5 USPS parcel ratio.
• Ready to Configure: Includes trim, solid rear cover, and connector kit for joining multiple units.

Please check the Product Data Sheet Here

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Specifications Table:

Specification	Details
Series	Salsbury 3700 Series 4C Horizontal Mailbox
Mount Type	Recessed mount, front loading
USPS Approval	Manufactured to USPS-STD-4C; USPS approved
Overall Dimensions	31.125" W x 57.125" H x 16.5" D
Weight	165 lbs
Columns / Width	Double-column (2 doors wide)
Tenant Compartments	15 MB1-equivalent doors
Parcel Lockers	3 integrated (meets 1:5 USPS ratio)
Outgoing Mail	10-3/4" W x 3/4" H mail slot with weather hood; anti-fish plate
Construction	Heavy-duty aluminum with stainless steel hardware
Finish Options	Powder-coated finishes available: aluminum, bronze, gold, sandstone
Locks	Heavy-duty cam locks with dust/rain shields and 3 keys each; USPS master arrow lock installed by USPS
Included Components	Factory-installed trim (3/4" W x 1/4" D), solid rear cover, 4C connector kit
Use Locations	Indoor or outdoor
Compliance	ADA height compliant units available
Door Sizes	MB1 3-1/4" H x 13-1/4" W; MB2 6-3/4" H x 13-1/4" W; MB3 10-1/4" H x 13-1/4" W; MB4 13-3/4" H x 13-1/4" W
Brand	Salsbury Industries

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Frequently Asked Questions (FAQ):

Q: Is this mailbox USPS approved?
A: Yes, it is manufactured to USPS-STD-4C specifications and is USPS approved for mail delivery.

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Q: What are the overall dimensions?
A: 31.125 in W x 57.125 in H x 16.5 in D.

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Q: How many tenant compartments and parcel lockers are included?
A: 15 tenant doors plus 3 integrated parcel lockers, with an outgoing mail slot.

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Q: Can it be installed outdoors?
A: Yes, it’s designed for indoor or outdoor recessed installations.

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Q: Does it include locks and keys?
A: Tenant doors include heavy-duty cam locks with dust/rain shields and 3 keys each; USPS installs the master arrow lock for the carrier door.

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Streamlined Mailroom Luxury, Engineered to Last

This recessed 4C mailbox brings architectural order to multifamily lobbies and modern commercial corridors. The clean aluminum face and precise grid of doors create a polished, graphic statement while concealing robust, industrial hardware. Style it within a monochrome wall panel or contrast with warm wood cladding to elevate the mail zone into a refined destination. It’s a sleek essential that marries security, function, and timeless design.

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Upgrade your building’s mailroom with this USPS-approved, secure 4C unit—order now for dependable delivery and a clean, professional look.

Installation