Mailbox Mounting Board .060 Ga. 7.625" W x 12.875" L Gibraltar UMBS0B06AM (2-PACK)

The Gibraltar UMBS0B06AM mailbox mounting board is a heavy-duty galvanized steel support plate engineered to securely anchor both light and heavy residential mailboxes to Gibraltar 4x4 wood or hollow posts. Measuring 7.625 inches wide by 12.875 inches long and fabricated from .060-gauge steel, it provides a rigid, stable base that accommodates mailboxes with either side-mount or under-mount hole patterns. The board features a black powder-coated finish over galvanized steel for superior corrosion resistance, ensuring long-term durability in all weather conditions. All necessary mounting screws are included for quick, tool-efficient installation, making it an ideal upgrade or replacement for wobbly, rusted, or inadequate mailbox supports.

Features  

- Supports both light and heavy residential mailboxes with secure, rigid mounting  

- Fits mailboxes with side-mount or under-mount hole configurations  

- Constructed from .060-gauge galvanized steel with black powder-coated finish  

- Resists rust, UV fading, and weathering for years of outdoor performance  

- Designed specifically for Gibraltar 4x4 wood or hollow mailbox posts  

- Includes all mounting hardware for fast, hassle-free installation  

- 12.875" x 7.625" size provides ample surface area for stability  

- Prevents mailbox sagging, wobbling, or detachment in high-wind areas  

- Sold as a 2-pack—ideal for dual-mailbox setups or backup replacements  

- Low-profile design maintains clean, professional curb appeal  

Specifications  

- Brand Name: Gibraltar  

- Model Name: Gibraltar UMBS0B06AM  

- Part Number: UMBS0B06AM  

- Product Type: Mailbox Mounting Board  

- Material: Steel  

- Gauge: .060 Ga  

- Finish: Galvanized with Black Powder Coat  

- Color: Black  

- Width: 7.625 in  

- Length: 12.875 in  

- Mount Type: Top Mount (for post-mounted mailboxes)  

- Hardware Included: Yes (Mounting Screws)  

- Number of Pieces: 2  

- Each Weight: 1.58 lbs  

- Product Dimensions: 12.875 x 7.625 x 0.1 in  

- Packaging Type: Bulk  

- Country of Origin: China  

- Alternative UPC: 046462012021  

- Manufacturer: Gibraltar Building Products  

Product Application  

The Gibraltar UMBS0B06AM mounting board is designed for homeowners, property managers, and postal contractors seeking a reliable, long-lasting solution for securing curbside mailboxes. It’s commonly used in suburban neighborhoods, rural driveways, and multi-unit housing where mailbox stability is critical for daily mail delivery and storm resistance. The robust .060-gauge steel prevents flexing under the weight of large parcel boxes or decorative mailboxes, while the dual-mount compatibility ensures it works with a wide range of USPS-approved models. Ideal for new mailbox installations or replacing corroded wood or thin-metal brackets, this board delivers structural integrity without visible hardware clutter. Its weather-resistant finish withstands snow, rain, and sun exposure, making it a durable, low-maintenance foundation that protects your mailbox investment for years.