--- product_id: 19300081 title: "Architectural Mailboxes 7540B-10 4x4 Adapter Plate Accessory, 4\" x 4\", Black" brand: "architectural mailboxes" price: "₨1392" currency: SCR in_stock: true reviews_count: 13 url: https://www.desertcart.sc/products/19300081-architectural-mailboxes-7540b-10-4x4-adapter-plate-accessory-4-x store_origin: SC region: Seychelles --- # Supports 50 lbs Multiple bolt patterns Durable steel build Architectural Mailboxes 7540B-10 4x4 Adapter Plate Accessory, 4" x 4", Black **Brand:** architectural mailboxes **Price:** ₨1392 **Availability:** ✅ In Stock ## Summary > 🔧 Elevate Your Mailbox Game! ## Quick Answers - **What is this?** Architectural Mailboxes 7540B-10 4x4 Adapter Plate Accessory, 4" x 4", Black by architectural mailboxes - **How much does it cost?** ₨1392 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.sc](https://www.desertcart.sc/products/19300081-architectural-mailboxes-7540b-10-4x4-adapter-plate-accessory-4-x) ## Best For - architectural mailboxes enthusiasts ## Why This Product - Trusted architectural mailboxes brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Sleek Aesthetic:** Finished in a stylish black powder coat that complements any outdoor decor. - • **Easy Installation:** Includes all necessary hardware and spacers for a hassle-free setup. - • **Heavy-Duty Support:** Designed to securely hold mailboxes weighing up to 50 lbs. - • **Robust Construction:** Crafted from galvanized steel for long-lasting durability and strength. - • **Versatile Mounting Options:** Easily adapts to your unique setup with top, side, and front mounting. ## Overview The Architectural Mailboxes 7540B-10 4x4 Adapter Plate is a versatile and durable accessory designed to securely attach your mailbox to a wooden 4x4 post. With multiple mounting options and a robust galvanized steel construction, this adapter plate ensures your mailbox remains stylish and functional, supporting up to 50 lbs. ## Description The 4 in. x 4 in. Post Adapter can be used to attach any Architectural Mailboxes post mount mailbox to a 4 in. x 4 in. wood post. The adapter plate is constructed of heavy gauge galvanized steel and finished with a durable powder coat. The adapter includes mailbox mounting hardware and spacers used for T2 sized mailbox installation. ## Features - Can be used to attach Architectural Mailboxes post mount Mailbox to a wooden 4x4 post - Multiple bolt hole patterns, including 4x10 bolt hole pattern and 11-1/4″ side flange mount screw pattern - Can be installed onto a wooden post as a top mount, side rail mount and front cantilever mount to suit your needs - Durable galvanized steel construction - Includes mailbox mounting hardware and spacers used for T2 sized mailbox installation.Finished with durable black powder coat.Supports up to a 50 lbs. mailbox ## Technical Specifications | Specification | Value | |---------------|-------| | Material Type | Metal | | Style Name | 7540B-10 | | Color | Black | | Item Weight | 1.5 Pounds | | Item Dimensions D x W x H | 4.6"D x 6"W x 1.9"H | | Mounting Type | Post Mount | | Access Location | Front | | Security Features | Hopper & Baffle | ## Images ![Architectural Mailboxes 7540B-10 4x4 Adapter Plate Accessory, 4" x 4", Black - Image 1](https://m.media-amazon.com/images/I/71ZnBfJEAhL.jpg) ![Architectural Mailboxes 7540B-10 4x4 Adapter Plate Accessory, 4" x 4", Black - Image 2](https://m.media-amazon.com/images/I/81CpT6ONtRL.jpg) ![Architectural Mailboxes 7540B-10 4x4 Adapter Plate Accessory, 4" x 4", Black - Image 3](https://m.media-amazon.com/images/I/71pz2QeHj2L.jpg) ![Architectural Mailboxes 7540B-10 4x4 Adapter Plate Accessory, 4" x 4", Black - Image 4](https://m.media-amazon.com/images/I/71UI+TcmeFL.jpg) ![Architectural Mailboxes 7540B-10 4x4 Adapter Plate Accessory, 4" x 4", Black - Image 5](https://m.media-amazon.com/images/I/81CpT6ONtRL.jpg) ## Questions & Answers **Q: Will this plate work with the Oasis Jr. Support arm?** A: yes **Q: Will this fit 6400p-r-10 mailbox? 11.3 x 18.2? (It's recommended by Architectural Mailboxes, but doesn't look like it will fit.** A: Hello, yes the 7540B-10 Mailbox Adapter Plate is compatible with the 6400P-R-10 Oasis Eclipse mailbox to mount to a 4x4 wood post. The 7540B-10 Adapter plate is designed to fit all Architectural Mailboxes post mount mailboxes. Thanks for reaching out! **Q: The post and hole in the adapter plate are 3.5 x 3.5. I cannot get it onto the post. Advice?** A: Hello, we are sorry to hear that the adapter plate will not easily slide onto your post. We suggest sanding down the top edge of the post so that the adapter plate is able to fit onto the top of the post. Thanks for reaching out! **Q: Would this fit the Gibraltar extra large rural mailbox ??** A: No! ## Customer Reviews ### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars Perfect for locking mailbox *by M***S on Reviewed in the United States on February 5, 2024* This bracket fit my locking mailbox perfectly. Made install easy! Will work with 4X4 or a 4X6 post (which I used) ### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars Very happy to see that this was offered. *by A***G on Reviewed in the United States on September 8, 2023* We ordered the mailbox and realized we needed to have a secure item for it. Thank you Amazon for offering this product and not having to look all over the place for the item. It worked perfectly. Thank you so much! ### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars Easy to use *by P***. on Reviewed in the United States on October 22, 2023* I could have built a bracket, but this was so simple: plumb the 4x4 post and stick this bracket on it. Screw it in and finished. The bracket has a good weather resistant finish, and there are multiple holes in pre-punched to adapt to almost any box and mounting situation.Well worth the money. --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.sc/products/19300081-architectural-mailboxes-7540b-10-4x4-adapter-plate-accessory-4-x](https://www.desertcart.sc/products/19300081-architectural-mailboxes-7540b-10-4x4-adapter-plate-accessory-4-x) --- *Product available on Desertcart Seychelles* *Store origin: SC* *Last updated: 2026-05-24*