--- product_id: 729018606 title: "4Pcs 8mm Flange Coupling Connector, Rigid Guide Model Coupler Accessory, Shaft Axis Fittings for DIY RC Model Motors" brand: "daier" price: "FREE" currency: EUR in_stock: false reviews_count: 5 category: "Daier" url: https://www.desertcart.pt/products/729018606-4pcs-8mm-flange-coupling-connector-rigid-guide-model-coupler-accessory store_origin: PT region: Portugal --- # 8mm Inner Diameter - Perfect Shaft Match M4 Hex Screws - Secure & Precise Fit 45# Alloy Steel - Superior Strength 4Pcs 8mm Flange Coupling Connector, Rigid Guide Model Coupler Accessory, Shaft Axis Fittings for DIY RC Model Motors **Brand:** daier **Price:** FREE **Availability:** ❌ Out of Stock ## Summary > ⚙️ Elevate Your RC Builds with Rock-Solid Shaft Couplings! ## 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?** FREE with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/729018606-4pcs-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 - • **Unmatched Durability:** Crafted from premium 45# alloy steel with electroplated finish for long-lasting, corrosion-resistant performance. - • **Complete DIY Ready Kit:** Includes 4 flange couplings, 8 M4 fastening screws, and a mini hex wrench for effortless installation and maintenance. - • **Trusted by Enthusiasts:** Highly rated with 4.6 stars from 870+ reviews—join the community of pros who demand precision and quality. - • **Precision Fit for RC Models:** Designed specifically for 8mm shafts, ensuring flawless alignment and smooth motor operation every time. - • **Enhanced Stability & Control:** Rigid flange design minimizes shaft wobble, delivering superior torque transfer and reliable motor response. ## Overview This 4-piece set of 8mm flange coupling connectors is engineered from high-grade 45# alloy steel with an electroplated finish, providing exceptional strength and corrosion resistance. Designed for RC model motors, each coupling ensures precise shaft alignment and stable torque transfer. The package includes all necessary screws and a hex wrench, making it a complete, ready-to-install solution favored by hobbyists and professionals alike. ## Description Parts for RC Airplane Boat ,DIY Model. Perfect accessories for RC Model motor, etc. Review: Precise - Very good quality. Would highly recommend. Review: Exactly as expected. - 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. ## 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 | | Brand | daier | | Color | Silver | | Colour | Silver | | Compatible Groove Diameter | 4 Millimeters | | Customer Reviews | 4.6 out of 5 stars 875 Reviews | | Drive Style | External Hex | | Exterior Finish | Aluminum,Steel | | Exterior finish | Aluminum , Steel | | Fastener Type | Flange | | Fastener type | Flange | | Finish Types | Electroplated | | Grade Rating | commercial | | Inside Thread Size | M4 | | Item Diameter | 8 Millimeters | | Item Weight | 0.11 Kilograms | | Manufacturer | daier | | Material | Metal | | Material Type | Metal | | Maximum Shear Strength | 370 MPa (53,611 psi) | | Metal Type | Alloy Steel | | Metal type | Alloy Steel | | Model | H420*4 | | Number Of Items | 4 | | Number of Packs | 4 | | Number of Pieces | 4 | | Outside Diameter | 8 Millimeters | | Part Number | H420*4 | | Screw Head Style | Hexagonal | | Set Name | 4 pieces | | Size Name | 8mm | | Thread Class | Class 6H | | Thread Size | M 4 | | Thread Style | Left Hand | | Thread Type | Iso Metric | | Thread size | M 4 | | Unit Count | 4 Count | ## Product Details - **Colour:** Silver - **Exterior finish:** Aluminum,Steel - **Fastener type:** Flange - **Material:** Metal - **Thread size:** M 4 ## 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 ### ⭐⭐⭐⭐⭐ Precise *by M***1 on 27 July 2026* Very good quality. Would highly recommend. ### ⭐⭐⭐⭐⭐ Exactly as expected. *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. ### ⭐⭐⭐⭐⭐ replace the screws with good size proper ones *by B***R on 5 July 2026* perfect fit for the proper pipe ## 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.pt/products/729018606-4pcs-8mm-flange-coupling-connector-rigid-guide-model-coupler-accessory](https://www.desertcart.pt/products/729018606-4pcs-8mm-flange-coupling-connector-rigid-guide-model-coupler-accessory) --- *Product available on Desertcart Portugal* *Store origin: PT* *Last updated: 2026-09-18*