Description
High-Security Commercial Horizontal Mailboxes Made in the USA

Revolutionize Your Mail Center with the H4C16D-20-D
In the ever-evolving landscape of mail management, National Mailboxes unveils the H4C16D-20-D, a game-changing solution in freestanding 4C depot mailboxes. This powerhouse unit boasts an impressive configuration of twenty tenant compartments, two dedicated parcel lockers, and an outgoing mail slot, all seamlessly integrated into a single, standalone structure.
Versatility Without Boundaries: Break free from conventional constraints with this adaptable system. The H4C16D-20-D excels in diverse environments, from sprawling university campuses to high-security government facilities.
Engineered for Maximum Efficiency:
- High-volume capacity with 20 individual compartments
- Dual parcel lockers address the surge in e-commerce deliveries
- Convenient outgoing mail slot streamlines communication
Compliance and Future-Proofing: Exceeding STD-4C requirements, this unit is built to withstand evolving postal regulations. Its robust construction and advanced security features ensure long-term relevance and protection.
Seamless Integration and User-Friendly Design: Facility managers will appreciate the straightforward installation process and minimal maintenance needs. The H4C16D-20-D effortlessly integrates into existing mail systems or serves as the cornerstone for new ones.
Adaptability Across Sectors: From corporate hubs to military bases, this versatile unit proves its worth in various settings. Its standalone nature makes it an ideal choice for locations undergoing renovations or requiring flexible mail solutions.
Transform Your Communication Infrastructure: More than just a receptacle, the H4C16D-20-D serves as a central hub for all mail-related activities. Its sleek, modern aesthetic complements any space while enhancing operational efficiency.
Embrace the Future of Mail Handling: Step into a new era of mail management with our innovative design. The H4C16D-20-D isn’t just about organizing correspondence—it’s about revolutionizing your entire approach to communication logistics.
By choosing the H4C16D-20-D, you’re investing in a solution that balances high capacity, security, and adaptability. Experience the next evolution in freestanding 4C depot mailboxes and elevate your mail management to unprecedented heights. Whether you’re equipping a bustling college campus, a corporate center, or a government agency, this unit is designed to meet your specific needs and surpass expectations.
Unit Size: 72-1/16″H x 32-11/16″W x 18″D
Total Doors: 20 Tenant Doors, 2 Parcel Lockers
Tenant Compartment Size: 3″H x 12″W x 15″D
Parcel Locker Size: 15″H x 12″W x 15″D
Outgoing Mail Slot Size: 1/2″H x 9-5/8″W
Outgoing Mail Compartment Size: 3″H x 12″W x 15″D
Mailbox Colors: Antique Bronze, Black, Dark Bronze, Gold Speck, Postal Gray, Sandstone (shown), Silver Speck, and White. 4C Depot Enclosure and 4C Mailbox Unit may be different colors.
Product Features:
- Includes Mounting Hardware & Special Tapcon Anchor Bolts Kit for Mounting/Securing 4C Depot Enclosure Bottom to Concrete Pad
- Local Post Office Approval Required
- Front loading
- For indoor or outdoor use
- Includes a 4C Horizontal Mailbox unit and a matching Freestanding Depot Enclosure
- Provides a convenient means of installing 4C Horizontal Mailboxes in locations where a wall mounted application is not desired or available
- Tenant doors include heavy duty cam locks, each with 3 keys
- Front-loading 4C mailbox includes a master access door with Private Lock for delivery/service to mailbox
- Parcel Locker doors includes dual, captive locking system which allows USPS to deliver a package to the locker leaving the key in the tenant’s mailbox. The package is retrieved by the tenant and key is retained securely in the lock.
- Includes standard silver adhesive decals with black numbers for door identification
- Custom numbering and engraving available
- Constructed of heavy gauge aluminum and stainless steel components
- Features a durable powder coated finish available in a variety of stylish colors
- USPS STD-4C requires a minimum of 1 parcel locker for every 10 tenant compartments
- Outgoing mail compartment includes a mail slot, anti-fish comb for security, and protective hood for weather protection
- Ideal for use at colleges, schools, private postal centers, corporate mail centers, military bases, government agencies, and many other applications
- Please Note: This large commercial mailbox is made to order and is non-returnable
Downloads:
- H4C16D-20 Horizontal Mailbox Technical Drawing
- HDEP16D Depot Enclosure Technical Drawing
- 4C Depot Cabinet Installation Manual
- 4C Depot Family of Products
Related Top Selling Commercial Mailboxes:
- Traditional Decorative Style CBUs
- High Security 16 to 29 Tenant Door 4C Horizontal Wall Mount Mailboxes
- NDCBU Pedestal Mailboxes
Similar Freestanding Depot Enclosures with 4C Horizontal Mailbox Units:
- Freestanding Depot Enclosure with 4C Horizontal 19 Tenant Mailboxes with 2 Parcel Lockers
- Freestanding Depot Enclosure with 4C Horizontal 18 Tenant Mailboxes with 2 Parcel Lockers
- Freestanding Depot Enclosure with 4C Horizontal 17 Tenant Mailboxes with 2 Parcel Lockers
4C Mailboxes FAQs:
- Are 4C Mailboxes Easy To Install? A Comparison
- Are Any Types of Commercial Mailboxes Being Phased Out?
- Are There Special Requirements for 4C Mailboxes?
- What are NEW Freestanding Depot Enclosures with 4C Horizontal Mailboxes?
- What Are 4C Recessed and Surface-Mounted Mailboxes?
- What Are the Benefits of 4C Mailboxes?























