--- product_id: 528572135 title: "20 Set 4040 Series Aluminum Extrusion Profile Connector Black | Includes 20pcs 3540 Corner Bracket, 40pcs M8 T-Slot Sliding Nuts & Hex Screw Bolt, 1 Wrench for 20S Aluminum Rail Accessories" brand: "petox" price: "€ 76.08" currency: EUR in_stock: true reviews_count: 8 category: "Petox" url: https://www.desertcart.sk/products/528572135-20-set-4040-series-aluminum-extrusion-profile-connector-black-includes store_origin: SK region: Slovakia --- # 20pcs 3540 Corner Brackets for rigid 90Β° joints 40pcs M8 x 16mm T-Slot Sliding Nuts & Hex Screws for secure fastening Includes 1pc 5mm wrench for effortless DIY assembly 20 Set 4040 Series Aluminum Extrusion Profile Connector Black | Includes 20pcs 3540 Corner Bracket, 40pcs M8 T-Slot Sliding Nuts & Hex Screw Bolt, 1 Wrench for 20S Aluminum Rail Accessories **Brand:** petox **Price:** € 76.08 **Availability:** βœ… In Stock ## Summary > πŸ› οΈ Build Bold. Connect Confidently. Own the Frame. ## Quick Answers - **What is this?** 20 Set 4040 Series Aluminum Extrusion Profile Connector Black | Includes 20pcs 3540 Corner Bracket, 40pcs M8 T-Slot Sliding Nuts & Hex Screw Bolt, 1 Wrench for 20S Aluminum Rail Accessories by petox - **How much does it cost?** € 76.08 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.sk](https://www.desertcart.sk/products/528572135-20-set-4040-series-aluminum-extrusion-profile-connector-black-includes) ## Best For - petox enthusiasts ## Why This Product - Trusted petox brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Trusted Brand Support:** PETOX stands behind quality with responsive after-sales service, ensuring your projects never hit a snag. - β€’ **Complete Installation Kit:** All-in-one set with corner brackets, sliding nuts, screws, washers, and wrenchβ€”no extra tools needed to start building. - β€’ **Durable & Corrosion-Resistant:** Powder-coated black aluminum and galvanized carbon steel hardware deliver long-lasting rust resistance and sleek aesthetics. - β€’ **Precision Engineered Rigidity:** Heavy-duty 4040 aluminum brackets ensure rock-solid 90Β° connections for your industrial frames and custom builds. - β€’ **Versatile Industrial Compatibility:** Perfect for 3D printers, CNC machines, robotics, and custom van racksβ€”engineered to fit metric 40 Series aluminum profiles. ## Overview The PETOX 20 Set 4040 Series Aluminum Extrusion Profile Connector Black is a comprehensive, cost-effective kit designed for secure 90Β° connections of 40mm aluminum extrusions. Featuring 20 corner brackets, 40 M8 T-slot sliding nuts and hex screws, washers, and a 5mm wrench, this powder-coated, corrosion-resistant set is ideal for industrial frames, CNC machines, 3D printers, and DIY projects. Trusted for durability and ease of installation, it’s a must-have for professionals and makers seeking reliable structural assembly. ## Description Buy 20 Set 4040 Series Aluminum Extrusion Profile Connector Black | Includes 20pcs 3540 Corner Bracket, 40pcs M8 T-Slot Sliding Nuts & Hex Screw Bolt, 1 Wrench for 20S Aluminum Rail Accessories: Brackets - desertcart.com βœ“ FREE DELIVERY possible on eligible purchases Review: It works well. - I use 4040 aluminum to build a roof rack on my van. This corner bracket is very rigid. I like it. Review: Cheap and sturdy - These work great and are much cheaper than other brackets. Though the nuts did need to be grinded down to fit in 1545 aluminum from tnutz. ## Features - 𝗖𝗒𝗦𝗧-π—˜π—™π—™π—˜π—–π—§π—œπ—©π—˜ π—šπ—’π—’π——π—¦ - Our 4040 series aluminum profile connector set contains all the required parts to complete the installation of 30mm aluminum extrusion at a 90 degree angle. Package includes 20pcs 3540 Corner Bracket, 40pcs M8 x 16mm T-Slot Sliding Nuts and Hex Screw Bolt, 40pcs washer, 1pc 5mm Wrench for set screw - π—ͺπ—œπ——π—˜ π—”π—£π—£π—Ÿπ—œπ—–π—”π—§π—œπ—’π—‘ - Our 4040 corner brackets is widely used building industrial aluminum frame structures, 3D printers, CNC routers, CNC laser cutters, CNC plasma cutters, 3D engraving machines, machine guards, robotics projects etc - π—¦π—¨π—£π—˜π—₯ 𝗖π—₯𝗔𝗙𝗧 - Our 4040 extrusion corner bracket set is made of high quality material well tested by the manufacturer to meet your daily needs. The T-Slot Aluminum Extrusion and M8 x 16mm Hardware Slide In T-Nuts are made from high quality carbon steel galvanized. Black stainless steel hexagonal screws, more rust resistant, no oil stains - π—˜π—”π—¦π—¬ π—œπ—‘π—¦π—§π—”π—Ÿπ—Ÿπ—”π—§π—œπ—’π—‘ - If you like DIY industrial frame construction, don't hesitate to use our aluminum corner bracket to connect pieces of 40mm aluminum extrusion at a 90 degree angle suitable for most of metric 40 Series Aluminum Profile Extrusion - π—˜π—«π—–π—˜π—Ÿπ—Ÿπ—˜π—‘π—§ π—”π—™π—§π—˜π—₯-π—¦π—”π—Ÿπ—˜π—¦ π—¦π—˜π—₯π—©π—œπ—–π—˜ - PETOX a trusted brand is committed to providing customers with better quality products and more pleasant service. If you have any questions about our products, please feel free to contact us, we are always ready to answer your questions and solve your problem. We stand by our products, and our customers are our focus as a business ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0BS6MG9D5 | | Best Sellers Rank | #6,805 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #10 in Hardware Brackets | | Brand | PETOX | | Brand Name | PETOX | | Color | Black | | Customer Reviews | 4.4 out of 5 stars 79 Reviews | | Finish Type | Powder Coated | | Finish Types | Powder Coated | | Included Components | 20pcs 3540 Corner Bracket, 40pcs M8 x 16mm T-Slot Sliding Nuts and Hex Screw Bolt, 1pc 5mm Wrench for set screw | | Item Depth | 1.19 inches | | Item Dimensions | 7.88 x 5.12 x 1.19 inches | | Item Weight | 1.47 kg | | Item dimensions L x W x H | 7.88 x 5.12 x 1.19 inches | | Manufacturer | PETOX | | Manufacturer Part Number | E2022000063 | | Material | Aluminum, Zinc Alloy | | Material Type | Aluminum, Zinc Alloy | | Model Number | 3540 | | Mounting Type | Corner Mount | | Unit Count | 20 Count | ## Product Details - **Brand:** PETOX - **Color:** Black - **Item Weight:** 1.47 Kilograms - **Item dimensions L x W x H:** 7.88 x 5.12 x 1.19 inches - **Material:** Aluminum, Zinc Alloy ## Images ![20 Set 4040 Series Aluminum Extrusion Profile Connector Black | Includes 20pcs 3540 Corner Bracket, 40pcs M8 T-Slot Sliding Nuts & Hex Screw Bolt, 1 Wrench for 20S Aluminum Rail Accessories - Image 1](https://m.media-amazon.com/images/I/81LyTWznMsL.jpg) ## Available Options This product comes in different **Style** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ It works well. *by C***O on February 2, 2026* I use 4040 aluminum to build a roof rack on my van. This corner bracket is very rigid. I like it. ### ⭐⭐⭐⭐⭐ Cheap and sturdy *by A***Y on September 2, 2023* These work great and are much cheaper than other brackets. Though the nuts did need to be grinded down to fit in 1545 aluminum from tnutz. ### ⭐⭐⭐ Good for little things. Need heavier duty for solid support *by M***T on April 16, 2026* These are good for basic items. I have used them For various mounts I’ve made. I have broken a few of them when used for main support. ## Frequently Bought Together - PETOX 20 Set Black 4040 Series Aluminum Extrusion Profile Connector, Includes 1pc Wrench, 20pcs 3540 Corner Bracket, 40pcs M8 T-Slot Sliding Nuts and Hex Screw Bolt for 20S Aluminum Rail Accessories - 4PCS T Slot 4040 Aluminum Extrusion Profile 19.7'',European Standard Anodized Linear Rail for 3D Printer Parts and CNC DIY 500mm Black(19.7inch) - 48”Aluminum Extrusion Profile Black 4040 T-Slot, European Standard Anodized Linear Bar Rail Framing 1220 mm for 3D Printer Parts, CNC Routers (4 Pack) --- ## 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.sk/products/528572135-20-set-4040-series-aluminum-extrusion-profile-connector-black-includes](https://www.desertcart.sk/products/528572135-20-set-4040-series-aluminum-extrusion-profile-connector-black-includes) --- *Product available on Desertcart Slovakia* *Store origin: SK* *Last updated: 2026-09-05*