--- product_id: 504175089 title: "8 PCS Anti-Theft Post Attachment Kit Sign Mounting Hardware for U Channel Post, Sign Post Mounting Bolts and Nuts,2.5\" Bolt" brand: "diyiiron" price: "ΰΈΏ1877" currency: THB in_stock: true reviews_count: 8 url: https://www.desertcart.co.th/products/504175089-8-pcs-anti-theft-post-attachment-kit-sign-mounting-hardware store_origin: TH region: Thailand --- # Zinc-coated rust-resistant metal 8 pcs 2.5" one-way security bolts Anti-theft beveled edge nuts 8 PCS Anti-Theft Post Attachment Kit Sign Mounting Hardware for U Channel Post, Sign Post Mounting Bolts and Nuts,2.5" Bolt **Brand:** diyiiron **Price:** ΰΈΏ1877 **Availability:** βœ… In Stock ## Summary > πŸ” Lock your signs down, lose the worry β€” secure like a pro! ## Quick Answers - **What is this?** 8 PCS Anti-Theft Post Attachment Kit Sign Mounting Hardware for U Channel Post, Sign Post Mounting Bolts and Nuts,2.5" Bolt by diyiiron - **How much does it cost?** ΰΈΏ1877 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.th](https://www.desertcart.co.th/products/504175089-8-pcs-anti-theft-post-attachment-kit-sign-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 - β€’ **Universal Fit:** Compatible with U-channel, square, and tubular posts for versatile use - β€’ **Complete Kit Ready:** Includes 8 bolts and 12 nuts for multiple sign setups - β€’ **Unbreakable Security:** One-way bolts and beveled nuts lock out thieves effortlessly - β€’ **Weatherproof Durability:** Zinc coating ensures zero rust even in wet environments - β€’ **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 - The anti-theft post attachment kit is designed for fasten signs easily and securely,suitable for 3/8" holes U-shaped channel posts, square metal posts,and tubular post - 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 | |---------------|-------| | Manufacturer | DIYIIRON | | Brand | DIYIIRON | | Item Weight | 11.3 ounces | | Product Dimensions | 3 x 0.5 x 0.4 inches | | Item model number | XFS170812 | | Color | Chrome | | Material Type | Metal | | Pre-printed | Letter | | Size | 8 PCS | | Fastener Type | Square | | Manufacturer Part Number | XFS170812 | ## Product Details - **Brand:** DIYIIRON - **Size:** 8 PCS - **Color:** Chrome - **Material:** Metal - **Mounting Type:** Wall Mount - **Pre-printed:** Letter - **Product Dimensions:** 3"L x 0.5"W - **Number of Pieces:** 8 - **Manufacturer:** DIYIIRON - **Unit Count:** 8.0 Count ## Images ![8 PCS Anti-Theft Post Attachment Kit Sign Mounting Hardware for U Channel Post, Sign Post Mounting Bolts and Nuts,2.5" Bolt - Image 1](https://m.media-amazon.com/images/I/71c-xjqcSsL.jpg) ## Available Options This product comes in different **Size** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Secure *by E***R on May 18, 2025* Excellent option for mounting street signs making it hard for some who might try to steal them. ### ⭐⭐⭐⭐⭐ Strong hardware *by H***Y on December 15, 2024* Once I figured it out and got it on it has held fast and I don’t worry my sign will be stolen or come off in the wind. ### ⭐⭐⭐⭐ 5/16" - 18; poor quality threads *by O***4 on March 15, 2025* Anybody wondering what the thread size is? Why is this detail not given in the listing? What I received is 5/16"-18.However, the nut threads are poor. While I was able to get every nut threaded onto every supplied bolt, with five of the six nuts it took an effort. Some nuts did not want to start threading, while others started fine but after several turns stuck. Not an easy installation. Eventually, I got them all working. I was just about to get out my tap and die set, but didn't need to go that extreme.I've no idea as to long-term durability. Hopefully they don't rust.I will be using these, just the nuts, to tamper-proof the ditch light installation on my 2020 Toyota Tundra. The original equipment carriage bolts that came with my light pods are 5/16" - 18. It would have been great to know what the thread size of this mounting hardware was before ordering. "[Bolts are] suitable for 3/8" holes," is all the information given in this listing at the time I ordered. 3/8" - 16 bolts will also fit a 3/8" hole, so I didn't know until they arrived what size they are.Since they worked, I'm giving 4 star. For the lack of thread size information, as well as the poor nut threads, I almost gave 3 star. --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.th/products/504175089-8-pcs-anti-theft-post-attachment-kit-sign-mounting-hardware](https://www.desertcart.co.th/products/504175089-8-pcs-anti-theft-post-attachment-kit-sign-mounting-hardware) --- *Product available on Desertcart Thailand* *Store origin: TH* *Last updated: 2026-04-25*