--- product_id: 548672833 title: "12Sets M6x40mm Black Hex Socket Cap Bolts and Barrel Nuts, Crib Bolts Flat Head Binding Bolt Screw Post for Belt Buckle Leather Furniture" brand: "mardatt" price: "£10.57" currency: GBP in_stock: true reviews_count: 5 category: "Mardatt" url: https://www.desertcart.co.uk/products/548672833-12sets-m6x40mm-black-hex-socket-cap-bolts-and-barrel-nuts store_origin: GB region: United Kingdom --- # M6x40mm precision bolts M6x17mm barrel nuts fit perfectly Includes hex key for instant install 12Sets M6x40mm Black Hex Socket Cap Bolts and Barrel Nuts, Crib Bolts Flat Head Binding Bolt Screw Post for Belt Buckle Leather Furniture **Brand:** mardatt **Price:** £10.57 **Availability:** ✅ In Stock ## Summary > 🔧 Lock in strength and style with every twist! ## Quick Answers - **What is this?** 12Sets M6x40mm Black Hex Socket Cap Bolts and Barrel Nuts, Crib Bolts Flat Head Binding Bolt Screw Post for Belt Buckle Leather Furniture by mardatt - **How much does it cost?** £10.57 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/548672833-12sets-m6x40mm-black-hex-socket-cap-bolts-and-barrel-nuts) ## Best For - mardatt enthusiasts ## Why This Product - Trusted mardatt brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Sleek Black Zinc Finish:** Rust-resistant, smooth, and glossy surface that elevates your hardware aesthetics. - • **Versatile DIY Essential:** Perfect for cribs, bed frames, cabinets, and more—your go-to for professional-grade furniture assembly. - • **Industrial-Grade Strength:** Premium metal bolts and nuts built to handle heavy-duty furniture projects with ease. - • **Precision Metric Threading:** Standardized M6 threading ensures a tight, secure fit every time—no wobble, no fuss. - • **Quick & Hassle-Free Installation:** Comes with a hex key for fast, tool-ready setup—get your project done in no time. ## Overview This set includes 12 M6x40mm black hex socket cap bolts and 12 M6x17mm barrel nuts, crafted from premium zinc-plated metal for durability and rust resistance. Designed with precise metric threading and a sleek finish, these bolts and nuts provide a secure, professional-grade fastening solution ideal for furniture assembly and DIY projects. The package also includes a hex key for quick installation, making it a must-have for millennial professionals who value both function and style in their home and office setups. ## Description ♞Mardatt M6 Black Hex Socket Cap Bolts and Barrel Nuts Kit 【Specifications】 ◆Color: Black ◆Finish: Zinc ◆Material: Premium Strong Metal ◆Type: Hex Socket Head ◆Sizes of Bolts: M6x40mm/1.57” ◆Sizes of Barrel Nuts: M6 x 17mm/0.67” 【Key Features】 ●Strong & Durable Material - Crafted of strong metal, they are tough, solid and stable, built to handle heavy loads and make strong joint. ●Nicely Finished Surface - Its surface is treated by zinc plating, rust resistant, smooth without burr. Flat round head makes it look nice after installation. ●Precise & Complete thread - Each Bolt and nut accords with standard metric system, offering a good match between bolt and barrel nuts. Multiple sizes are availiable which will support your various projects. 【Package Included】 12 x M6*40mm Bolts 12 x M6*17mm Barrel Nuts 1 x Hex Key Total: 25pcs ✎✎【Friendly Customer Service】 If for any reason you are not fully satisfied with your purchase, please don’t hesitate to contact us at any time. We would reply within 12-hour and solve all the problems to your satisfaction:) ♥【Warm Tips】 1. Please check the 2nd picture for the detailed dimensions of the product before purchase. 2. Small parts, keep away from children under 6 years old. Review: Exactly as advertised, just what I needed Review: Exactly as advertised ## Features - ♛【What’s In The Package】--- Includes 12pcs Hex Socket Cap Bolts (Thread Size= M6x40mm/1.57”) + 12pcs Barrel Nuts (Thread Size= M6x17mm/0.67”) + 1pc Hex Key. PLEASE SEE MORE SIZE DETAILS ON OUR 2ND PICTURE. - ♛【Strong & Durable Type】--- The furniture bolts and barrel nuts are made of premium strong metal, high hardness, smooth without burr. The rust preventative black zinc finishes ensure their good performance in dry, indoor conditions, which also give them a slightly glossy appearance. - ♛【Selected Custom Set】--- These furniture hardware features standardized metric thread on both the female threaded barrel nuts & the male threaded bolts, clean, accurate and neat. Once installed, they will make a tight attachment together, and bind the items firmly. - ♛【Multipurpose Hardware】--- No matter if you need it for DIY furniture project or as a replacement parts, our product will be your best helper. They are widely used in furniture like cribs, bed frame, chairs, cabinets，bookcases, wardrobes, workbench and much more. - ♛【Installs in An Instant】--- Making a strong joint is a Breeze. Just make a suitable hole slightly larger than the diameter of the nut rod first, then these set easily installs with the included hex key. Give them a try. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B08MFDTPG1 | | Best Sellers Rank | #26,155 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #113 in Hardware Nuts & Bolts | | Brand | Mardatt | | Color | Black | | Colour | Black | | Compatible Groove Diameter | 0.7 Inches | | Customer Reviews | 4.3 out of 5 stars 108 Reviews | | Fastener Type | Bolt | | Fastener type | Bolt | | Finish Types | Zinc | | Grade Rating | Industrial | | Head style | Hex | | Item Diameter | 6 Millimeters | | Item Shape | Hexagonal | | Manufacturer | Mardatt | | Material | Zinc | | Material Type | Zinc | | Number of Pieces | 25 | | Screw Head Style | Hex | | Size | M6x40mm/1.57” | | Size Name | M6x40mm/1.57” | | Thread Size | M6x40mm | | UPC | 798789765592 | | Unit Count | 12 Count | ## Product Details - **Size:** M6x40mm/1.57” - **Color:** Black - **Material:** Zinc - **Brand:** Mardatt - **Fastener Type:** Round, Cap, Bolt, Solid, Female Threaded, Standard ## Images ![12Sets M6x40mm Black Hex Socket Cap Bolts and Barrel Nuts, Crib Bolts Flat Head Binding Bolt Screw Post for Belt Buckle Leather Furniture - Image 1](https://m.media-amazon.com/images/I/71PNGbszAuL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Exactly as advertised, just what I needed *by A***R on 18 January 2025* ### ⭐⭐⭐⭐⭐ Exactly as advertised *by D***C on 21 December 2025* ### ⭐⭐⭐⭐⭐ Good quality *by A***A on 19 October 2025* ## Frequently Bought Together - Mardatt 12Sets M6x40mm Black Hex Socket Cap Bolts and Barrel Nuts, Crib Bolts Flat Head Binding Bolt Screw Post for Belt Buckle Leather Furniture - Mywish M8 x 12mm 20Pcs Flat Head Hex Socket Cap Screws Bolts, 304 Stainless Steel Furniture Bolts Full Thread, Black Oxide & Hex Spanner - M6 x 25mm 10Pcs Flat Head Hex Socket Cap Screws Bolts, 304 Stainless Steel 18-8, Full Thread, Black Oxide by SG TZH (with Hex Spanner) --- ## 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.co.uk/products/548672833-12sets-m6x40mm-black-hex-socket-cap-bolts-and-barrel-nuts](https://www.desertcart.co.uk/products/548672833-12sets-m6x40mm-black-hex-socket-cap-bolts-and-barrel-nuts) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-05-22*