--- product_id: 504175089 title: "M8 x 2.5\" Anti‑Theft Sign Post Mounting Hardware Kit for U‑Channel Posts" brand: "diyiiron" price: "A$40" currency: AUD in_stock: true category: "Diyiiron" url: https://www.desertcart.com.au/products/504175089-m8-x-2-5-anti-theft-sign-post-mounting-hardware store_origin: AU region: Australia --- # Zinc-coated rust-resistant metal 8 pcs 2.5" one-way security bolts Anti-theft beveled edge nuts M8 x 2.5" Anti‑Theft Sign Post Mounting Hardware Kit for U‑Channel Posts **Brand:** diyiiron **Price:** A$40 **Availability:** ✅ In Stock ## Summary > 🔐 Lock your signs down, lose the worry — secure like a pro! ## Quick Answers - **What is this?** M8 x 2.5" Anti‑Theft Sign Post Mounting Hardware Kit for U‑Channel Posts by diyiiron - **How much does it cost?** A$40 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.com.au](https://www.desertcart.com.au/products/504175089-m8-x-2-5-anti-theft-sign-post-mounting-hardware) ## Best For - diyiiron enthusiasts ## Why This Product - Trusted diyiiron brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Universal Fit:** Compatible with U-channel, square, and tubular posts for versatile use - • **Complete Kit Ready:** Includes 8 bolts and 12 nuts for multiple sign setups - • **Unbreakable Security:** One-way bolts and beveled nuts lock out thieves effortlessly - • **Weatherproof Durability:** Zinc coating ensures zero rust even in wet environments - • **Quick & Smart Installation:** Dual-nut locking system secures signs fast with just a wrench ## Overview The DIYIIRON 8 PCS Anti-Theft Post Attachment Kit features 2.5" one-way security bolts and beveled edge nuts designed to prevent unauthorized removal. Made from zinc-coated metal, it resists rust and fits U-shaped channel, square, and tubular posts. The innovative dual-nut installation system ensures fast, secure mounting, making it ideal for protecting your signage in any environment. ## Description With this post attachment kit, you can attach your sign to U-shaped channel posts, square metal posts,and tubular post.The anti-theft design of bolts and nuts can better protect your post and channelSimple installation,just install the two nuts in turn, and then tighten them with a wrench. ## Features - Designed for secure sign mounting. METRIC M8 threaded hardware, fits through 3/8‑INCH‑DIAMETER HOLES only. Works for U‑channel sign posts, square metal posts and tubular posts. NOTE: This is M8 metric thread, NOT 3/8‑16 UNC US‑standard thread. Please verify your hole & thread requirement before purchase. - Anti-Theft Design:The nut of the post attachment kit is a anti-theft beveled edge design, and the bolt is one-way security bolt, which can prevent removal with ordinary tools - Made of superior metal with ZINC coated.This sign attachment kit will not rust when used in wet areas - Package Includes:8 PCS 2.5" Bolts, 12 PCS Anti-Theft Nuts - Installation:1.Tighten first nut by hand onto the back of the sign post. 2.Tighten the second nut, upside-down, on top of the first nut. The second nut locks with the first nut. 3.Insert a wrench in between the two nuts and tighten until secure. 4.After tightening, remove 2nd nut and save for removal or next install ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0BGGDR3L7 | | Best Sellers Rank | #71,072 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #958 in Industrial Warning Signs | | Brand Name | DIYIIRON | | Color | Chrome | | Customer Reviews | 4.5 4.5 out of 5 stars (131) | | Item Dimensions L x W | 3"L x 0.5"W | | Item Highlight | 8 PCS Simple installation steps for fast, secure sign attachment to U‑channel, square and tubular metal sign posts. | | Manufacturer | DIYIIRON | | Material | Metal | | Model Number | XFS170812 | | Mounting Type | Pole Mount | | Number of Pieces | 8 | | Part Number | XFS170812 | | Pre Printed Text | Letter | | Recommended Uses For Product | Property | | Size | 8 PCS | | Unit Count | 8 Count | ## Product Details - **Brand:** DIYIIRON - **Color:** Chrome - **Manufacturer:** DIYIIRON - **Material:** Metal - **Mounting Type:** Pole Mount - **Number of Pieces:** 8 - **Pre-printed:** Letter - **Product Dimensions:** 3"L x 0.5"W - **Recommended Uses For Product:** Property - **Size:** 8 PCS ## Images ![M8 x 2.5" Anti‑Theft Sign Post Mounting Hardware Kit for U‑Channel Posts - Image 1](https://m.media-amazon.com/images/I/71c-xjqcSsL.jpg) ## Available Options This product comes in different **Size** options. --- ## 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.com.au/products/504175089-m8-x-2-5-anti-theft-sign-post-mounting-hardware](https://www.desertcart.com.au/products/504175089-m8-x-2-5-anti-theft-sign-post-mounting-hardware) --- *Product available on Desertcart Australia* *Store origin: AU* *Last updated: 2026-11-15*