--- product_id: 570711663 title: "Learn More" brand: "moroinriz" price: "134558Fr" currency: CDF in_stock: true category: "Moroinriz" url: https://congo.desertcart.com/products/570711663-learn-more store_origin: CD region: Congo --- # 20x20x4mm Square Head Base 304 Stainless Steel Durability M6/M8 Threading Options Learn More **Brand:** moroinriz **Price:** 134558Fr **Availability:** ✅ In Stock ## Summary > 🔧 Secure your adventure gear with precision and style—don’t get left behind! ## Quick Answers - **What is this?** Learn More by moroinriz - **How much does it cost?** 134558Fr with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [congo.desertcart.com](https://congo.desertcart.com/products/570711663-learn-more) ## Best For - moroinriz enthusiasts ## Why This Product - Trusted moroinriz brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Heavy-Duty Strength:** Robust square head base (20mm x 20mm x 4mm) and fully threaded M6/M8 bolts ensure secure mounting for all your rooftop gear. - • **Complete Mounting Kit:** Includes T-bolts, lock nuts, and washers—everything you need for a professional-grade rooftop rack upgrade. - • **Versatile Compatibility:** Perfectly engineered for Whispbar, Yakima Jetstream, and most T-slot roof racks, supporting bike, ski, kayak racks, solar panels, and more. - • **Unmatched Rust Resistance:** Crafted from marine-grade 304 stainless steel to withstand saltwater and harsh environments without corrosion. - • **Precision Fit & Easy Installation:** Slide into your T-slot crossbar effortlessly—no drilling or clamps needed for a sleek, scratch-free setup. ## Overview These T Slot Bolts are premium-grade 304 stainless steel mounting hardware designed for T-track roof racks. With a 20x20x4mm square head base and M6/M8 threading, they provide a rust-resistant, corrosion-proof, and easy-to-install solution for securely attaching bike racks, ski racks, cargo baskets, solar panels, and more to your vehicle’s roof crossbars. Compatible with popular brands like Whispbar and Yakima Jetstream, this 6-piece kit includes all necessary nuts and washers for a hassle-free upgrade. ## Description CompatibilityPerfect for roof rack with railsFor Whispbar Rail BarFor Whispbar Flush BarFor Whispbar Through Bar (Not Fit for Whispbar HD Bar)For Yakima Jetstream with T slots (Not fit for Yakima CoreBar without T slots)Some roof rack / luggage rack and cargo basket304 Stainless SteelMade of heavy duty 304 stainless steel, it features rust resistant and corrosion resistant in salt water, perfect t-track accessories for camping, touring, travel, and other outdoor activitiesHeavy Duty Rooftop Mounting Hardware Kit for Easy MountingPerfect roof rack replacement parts for your roof bars, just need to slide it into roof bar, simpler to use compared with t track clampsWide ApplicationUtility t-track bolts with matching nuts washer barrel kit for most roof rack systems, roof basket, allow you to attach bike carrier racks, kayak rack, bike carriers, ski holders, snowboard roof rack, side awning, canopy, surfboard roof rack to your roof rack bars with easeSpecItem Name: T Bolts for T TrackMaterial: 304 Stainless SteelThread Size: M6 x 1 (1/4-20), M8 x 1.25 (5/16-18) (Optional)Bolt Length: 30mm, 35mm (Optional)Square Head Base: 0.79 in x 0.79 in x 0.16 in (20mm x 20mm x 4mm)Washer: 0.04 in x 0.47 in (1mm x 12mm)Nut: 0.39 in x 0.2 in (10mm x 5mm)Fit Vehicle: SUV, ATV, UTV, RV, VANMounting Type: Roof Rack Mounting, Cross Bar Mounting, Roof Top Mounting ## Features - Versatile t Track Bolts - this t-track adapter accessory kit is a great solution to attach items firmly to your t track crossbar, compatible with t slot, perfect t-track adapter accessory kit to attach bike rack / ski rack / kayak rack, roof rack awning, solar panel, fishing rod holder, cargo box to roof rack cross bars, roof rack cargo basket, car rooftop platform or side rails, works well with most solar panel mounting brackets - Technical Specification - the t bolt is made of 304 solid stainless steel, 79 in x 0.79 in x 0.16 in (20mm x 20mm x 4mm) square head base, m6 / m8 threading, 30mm / 35mm / 65mm length - Easy to Set Up - no drilling, cleaner look, just need to slide it into the t slot of your roof bar, and won't scratch your cross bar, great alternative to roof rack t track clamp*NOTE-please check the dimension of your cross bar rail, this t bolts base is 20mm x 20mm x 4mm (L x W x Thickness)* - Marine Resistant - stamping t slot accessories, more durable compared with welding parts, made of solid 304 stainless steel, it features rust resistant and corrosion resistant even in salt water, designed for most harsh environment, perfect t track accessories for suv / rv roof top - What You Will Receive - roof rack mounting hardware kit, include t-bolt with lock nuts and washer, satisfying purchasing experience of your customer is our priority, please feel free to contact us if you have other questions! Thanks for your supporting! ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0CGB1R63J | | Best Sellers Rank | #10,003 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #2 in Bike Car Rack Accessories | | Brand | moroinriz | | Color | M8x30mm,6pk | | Compatible Groove Diameter | 0.39 inches | | Customer Reviews | 4.3 4.3 out of 5 stars (405) | | Exterior Finish | Stainless Steel | | Fastener Size | M8 | | Fastener Type | T-Bolt | | Finish Types | Stainless Steel | | Grade Rating | Grade 304 | | Head Type | Square | | Item Diameter | 8 millimeters | | Item Hardness | Grade 5 | | Manufacturer | moroinriz | | Manufacturer Grade | Grade 304 | | Material Type | Stainless Steel | | Metal Type | Stainless Steel | | Model | QM-BOL-15 | | Number Of Items | 6 | | Number of Packs | 1 | | Number of Pieces | 6 | | Part Number | QM-BOL-15 | | Screw Head Style | Square | | Screw Point Style | Square | | Set Name | T-Bolt Mounting Hardware Kit (6 Pieces) | | Set Screw Thread Type | Metric | | Size Name | M8 | | Thread Class | 3B | | Thread Coverage | Fully Threaded | | Thread Size | M8 | | Thread Style | Right Hand | | Thread Type | Metric | | Unit Count | 6 Count | ## Product Details - **Exterior Finish:** Stainless Steel - **Head Style:** Square - **Manufacturer Grade:** Grade 304 - **Material:** Stainless Steel - **Thread Size:** M8 ## Images ![Learn More - Image 1](https://m.media-amazon.com/images/I/71j8Sj58yzL.jpg) ![Learn More - Image 2](https://m.media-amazon.com/images/I/614ZkdtXBOL.jpg) ![Learn More - Image 3](https://m.media-amazon.com/images/I/71CmOjeWprL.jpg) ![Learn More - Image 4](https://m.media-amazon.com/images/I/71cGgKk3BCL.jpg) ![Learn More - Image 5](https://m.media-amazon.com/images/I/81j2mcYt0EL.jpg) ## Available Options This product comes in different **Color** options. ## Frequently Bought Together - T Slot Bolts for Thule, Yakima Roof Rack Cross Bars, Platform, Cargo Basket, Stainless Square T Track Bolt Adapter to Secure Bike/Ski/Kayak Rack, Solar Panel, Awning, 4mm Thick - T Track Mount Tie Down Anchor for Roof Rack, M8 Heavy Duty Ring Shaped Eye Bolt, Stainless Steel T Bolt Eye Nut Tie Down Rings for Holding Bungee Cord, Ropes, Hooks - moroinriz T Slot Bolts for Thule, Yakima Roof Rack Cross Bars, Platform, Cargo Basket, Stainless Square T Track Bolt Adapter to Secure Bike/Ski/Kayak Rack, Solar Panel, Awning --- ## 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://congo.desertcart.com/products/570711663-learn-more](https://congo.desertcart.com/products/570711663-learn-more) --- *Product available on Desertcart Congo* *Store origin: CD* *Last updated: 2026-08-31*