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Architectural Mailboxes Black Polymer Mailbox Mounting Board .15 Ga. 17 in. L
Architectural Mailboxes Black Polymer Mailbox Mounting Board .15 Ga. 17 in. L

Architectural Mailboxes Black Polymer Mailbox Mounting Board .15 Ga. 17 in. L

Made in America

Support American manufacturers + independent hardware retailers in one purchase.

Upgrade your curbside setup with the Architectural Mailboxes Black Polymer Mailbox Mounting Board. This top-mount base is designed to support a single mailbox on either a vertical…

Architectural Mailboxes MPN GMB225BAM In Stock & Ready to Ship
Local Price Check i Local stores may price this as low as $20.99. Our online price is $22.99.
$22.99
Includes free shipping on orders over $75 · $8.99 standard below
Delivery in as little as 1–4 business days Order within — for same-day shipping
Shop Local · Support Independent

Every order helps keep your local hardware store on the corner.

Why we built NHG
You might find it for less locally. Independent retailers often offer competitive pricing — some products are even cheaper in-store than online.
Real expert advice — not search results. Independent hardware staff know their inventory and the local conditions you're working in.
Keep the neighborhood working. Every dollar spent at an independent retailer returns roughly 3x more to your local economy than at a national chain.

About Product Overview

Upgrade your curbside setup with the Architectural Mailboxes Black Polymer Mailbox Mounting Board. This top-mount base is designed to support a single mailbox on either a vertical post or a cross-arm configuration, delivering a stable, cleanly aligned foundation that enhances both function and curb appeal.

  • Dimensions: 17" long x 6-1/2" wide
  • Material: Polymer, 0.15" thick
  • Finish: Black
  • Mount Type: Top Mount
  • Usage: Fits vertical posts or cross-arm posts
  • Hardware Included: Yes
  • Screws Included: No
  • Package: 1 per package
  • Brand: Architectural Mailboxes

The Black Polymer Mounting Board is a purpose-built solution that pairs seamlessly with Architectural Mailboxes posts and hardware. Its top-mount design creates a secure, flush connection that minimizes movement and misalignment, helping your mailbox stay at the correct height and angle for easy mail retrieval in all weather conditions.

Designed for versatility, this mounting board supports both vertical and cross-arm post applications, making it ideal whether you’re installing a new mailbox or replacing an aging mounting surface. The polymer construction offers a lightweight, durable alternative to metal boards, delivering straightforward installation and low maintenance over time.

Installation tip: since screws are not included, choose screws that fit your post or cross-arm and align the board precisely before fastening to ensure a stable, square setup. The included hardware covers the essentials for mounting, while you provide the screws that match your specific post configuration.

Trust the reliability of Architectural Mailboxes with this Black Polymer Mounting Board—built to endure the elements and keep your curbside mailbox securely in place, so you can collect mail with confidence.

The Details Specifications

Brand Architectural Mailboxes
UPC 046462011543
Case Pack Quantity 6 per case
Retail Unit Quantity 1
Dimensions (L × W × H) 4 × 6 × 17
Weight 1 lbs
Country of Origin USA
Safety Data Sheet (SDS) Manufacturer documentation · opens in new tab

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