--- product_id: 505999951 title: "4Pcs 8mm Flange Coupling Connector, Rigid Guide Model Coupler Accessory, Shaft Axis Fittings for DIY RC Model Motors" brand: "daier" price: "$43.30" currency: USD in_stock: true reviews_count: 5 category: "Daier" url: https://www.desertcart.us/products/505999951-4pcs-8mm-flange-coupling-connector-rigid-guide-model-coupler-accessory store_origin: US region: United States of America --- # 8mm Inner Diameter - Precision Fit M4 Threaded Fasteners - Secure Fit 45# Steel Alloy - Superior Strength 4Pcs 8mm Flange Coupling Connector, Rigid Guide Model Coupler Accessory, Shaft Axis Fittings for DIY RC Model Motors **Brand:** daier **Price:** $43.30 **Availability:** ✅ In Stock ## Summary > ⚙️ Elevate Your RC Game with Precision Couplings – Because Every Detail Counts! ## Quick Answers - **What is this?** 4Pcs 8mm Flange Coupling Connector, Rigid Guide Model Coupler Accessory, Shaft Axis Fittings for DIY RC Model Motors by daier - **How much does it cost?** $43.30 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/505999951-4pcs-8mm-flange-coupling-connector-rigid-guide-model-coupler-accessory) ## Best For - daier enthusiasts ## Why This Product - Trusted daier brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Trusted by Pros:** Highly rated with 4.6 stars from 800+ users who demand reliability in their RC builds. - • **Smooth & Safe Design:** Chamfered edges and flawless machining ensure no burrs, making installation safe and seamless. - • **Effortless Installation:** Includes M4 mini hex wrench and fastening screws for quick, hassle-free assembly. - • **Versatile Compatibility:** Perfectly sized 8mm inner diameter fits a wide range of RC model motors and DIY projects. - • **Engineered for Precision:** Crafted from premium 45# steel with zinc plating for unmatched durability and corrosion resistance. ## Overview This 4-piece set of 8mm flange coupling connectors is crafted from durable 45# steel with zinc plating, designed for secure and precise shaft connections in RC models and DIY motors. Featuring M4 threaded fasteners and including a mini hex wrench, these couplers ensure easy installation and long-lasting performance, trusted by hobbyists and professionals alike. ## Description Parts for RC Airplane Boat ,DIY Model. Perfect accessories for RC Model motor, etc. Review: Perfect Machining and Great Design – Each Flange Was Flawless The manufacturer can be rightfully proud of the superior craftsmanship of the workers and high Quality Control inspections. Each flange was perfect: dimensions correct, NO dangerous sharp burrs left over from machining, chamfered guides for axle hole, chamfered beveled guide to screw threads for easier screw starting, and smooth screwing perfectly shaped internal threads. It was really polite, or something, that the manufacturer included the tiny Allen Wrench for the M3 socket head grub screws. Review: Nice quality, used to attach to output 14m shaft of worm gear reducers (after removing key) etc. ## Features - Durable Material: The coupling connector is made of 45# steel( it is better than copper and aluminum alloys ), heat and electroplated process make it sturdiness and insulation, striking shaft more stable and easy for installment and replacement. - Widely use: used in model shaft connection, perfect accessories for RC Model motor. - Size:Inner Diameter: 8mm,Height:13mm,Fixed Hole Screw: M4. - Package included:4Pcs 8mm Flange Shaft Coupling + 1Pcs M4 Mini Hex Wrench + 8 x M4 Fastening Screw ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B08335MYGW | | Best Sellers Rank | 209,839 in Business, Industry & Science ( See Top 100 in Business, Industry & Science ) 197 in Rigid Set Screw Couplings | | Brand Name | daier | | Colour | Silver | | Compatible Groove Diameter | 4 Millimeters | | Customer Reviews | 4.6 4.6 out of 5 stars (812) | | Drive Style | External Hex | | Exterior Finish | Zinc | | Fastener Type | Flange | | Finish Types | Zinc-Plated | | Grade Rating | commercial | | Inside Thread Size | M 4 | | Item Diameter | 8 Millimetres | | Item Weight | 0.11 Kilograms | | Manufacturer | daier | | Manufacturer Part Number | H420*4 | | Material Type | Metal | | Metal | Alloy Steel, Aluminium, Copper | | Model Number | H420*4 | | Number of Pieces | 4 | | Size | 8 mm | | Thread Class | Class 2B | | Thread Size | M 4 | | Thread Style | Metric | | Thread Type | ISO Metric | ## Product Details - **Brand:** daier - **Colour:** Silver - **Exterior finish:** Zinc - **Fastener type:** Flange - **Finish type:** Zinc-Plated - **Item weight:** 0.11 Kilograms - **Material:** Metal - **Metal type:** Alloy Steel, Aluminium, Copper - **Thread size:** M 4 - **Thread type:** ISO Metric ## Images ![4Pcs 8mm Flange Coupling Connector, Rigid Guide Model Coupler Accessory, Shaft Axis Fittings for DIY RC Model Motors - Image 1](https://m.media-amazon.com/images/I/61upRBXCDeL.jpg) ![4Pcs 8mm Flange Coupling Connector, Rigid Guide Model Coupler Accessory, Shaft Axis Fittings for DIY RC Model Motors - Image 2](https://m.media-amazon.com/images/I/61eT3Es2veL.jpg) ![4Pcs 8mm Flange Coupling Connector, Rigid Guide Model Coupler Accessory, Shaft Axis Fittings for DIY RC Model Motors - Image 3](https://m.media-amazon.com/images/I/51oHzBdAY2L.jpg) ## Available Options This product comes in different **Size** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by R***R on 10 February 2026* Perfect Machining and Great Design – Each Flange Was Flawless The manufacturer can be rightfully proud of the superior craftsmanship of the workers and high Quality Control inspections. Each flange was perfect: dimensions correct, NO dangerous sharp burrs left over from machining, chamfered guides for axle hole, chamfered beveled guide to screw threads for easier screw starting, and smooth screwing perfectly shaped internal threads. It was really polite, or something, that the manufacturer included the tiny Allen Wrench for the M3 socket head grub screws. ### ⭐⭐⭐⭐⭐ Review *by R***L on 2 September 2023* Nice quality, used to attach to output 14m shaft of worm gear reducers (after removing key) etc. ### ⭐⭐⭐⭐⭐ Review *by A***H on 17 April 2024* Fits the three 8mm rods that I needed them for. Threaded screw fits properly and snugly. I had a bit of a laugh in that the resealable package ("ziploc" style) was heat-sealed shut BELOW the reseal, so after breaking the heat-seal (cutting it off) you couldn't reseal it anymore. ## Frequently Bought Together - 4Pcs 8mm Flange Coupling Connector, Rigid Guide Model Coupler Accessory, Shaft Axis Fittings for DIY RC Model Motors - BRINGSMART 12V 160rpm DC Worm Gear Motor 10kg.cm Self-Locking Engine Reversed Mini Turbine Geared Motor for DIY Robot Rotating Table Door Lock Curtain Machine (12V 160rpm) - Zeberoxyz 2PCS Set GT2 Synchronous Wheel 20&60 Teeth 8mm Bore Aluminum Timing Pulleys with 2PCS Length 200mm Width 6mm Belt (20-60T-8B-6) --- ## 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.us/products/505999951-4pcs-8mm-flange-coupling-connector-rigid-guide-model-coupler-accessory](https://www.desertcart.us/products/505999951-4pcs-8mm-flange-coupling-connector-rigid-guide-model-coupler-accessory) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-04-22*