Black rectangular mounting plate with multiple holes and white geometric cutouts (triangles and squares) for hardware alignment or wiring.

DIY’s Best Friend poster: easy mailbox installs; compatible with Architectural Mailboxes and posts with code letters A–D; mounting plate shown.

Product diagram of a black mounting plate with multiple holes, showing included mounting hardware and side/bottom mounting option (infographic).

Advertisement showcasing a rust-proof plastic plate with curved text: 'Made from Durable Rust-Proof Plastic' and a blue circle highlight; features a black perforated component with cutouts and a label 'Fade-resistant UV inhibitor finish'

Engineering drawing of a rectangular mounting plate with top and side views, showing overall length ~12.5 in, width ~4.0 in, and multiple small mounting holes (Ø0.13 in, Ø0.22 in).

Plastic Mailbox Mounting Board

Rust-Proof, Worry-Free: Made from durable plastic, this mailbox mount accessory stands up to rain, snow, & humidity without ever rusting.

Built for Bright Days: The UV-inhibitor finish helps this plastic mailbox mounting accessory hold its color even on the sunniest days.

Plays Well with Others: Multiple mounting holes fit most mailbox brands—

Architectural preferred, of course.

Made to Fit: Compatible with Architectural Mailboxes curbside mailboxes with match code designation A, B, C, or D

Simple Setup: Assembly is quick & easy, giving you a smooth and stress free setup.

What's Included: Mounting board and installation hardware.

From Our Home to Yours: Built with care—this product is designed & made in the USA.

SKU: PLMB06AM

WHERE TO BUY

Plastic Mailbox Mounting Board

Make mailbox installation a total breeze with the Architectural Mailboxes Plastic Mailbox Mounting Board- the mailbox accessory that does the hard work for you. Compatible with all Architectural Mailboxes posts labeled with Match Code A, B, C, or D, this handy mailbox add-on ensures a perfect fit every time. Crafted from durable, rust-proof polypropylene and treated with UV protection, it’s built to handle years of sun, rain, and daily deliveries. Whether you’re using a 4x4 wood or plastic post, the included mounting hardware and easy-to-follow instructions make setup quick and simple. Durable, dependable, and delightfully easy, it’s the mailbox part that proves installation doesn’t have to be hard work.

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