--- product_id: 594603738 title: "daier 4Pcs 3.17mm Flange Coupling Connector, Rigid Guide Model Coupler Accessory, Shaft Axis Fittings for DIY RC Model Motors" brand: "daier" price: "€ 39.69" currency: EUR in_stock: true reviews_count: 5 category: "Daier" url: https://www.desertcart.at/products/594603738-daier-4pcs-3-17mm-flange-coupling-connector-rigid-guide-model store_origin: AT region: Austria --- # Precision M3 Threaded Fasteners 45# Alloy Steel Durability Complete 4-Piece Coupling Kit daier 4Pcs 3.17mm Flange Coupling Connector, Rigid Guide Model Coupler Accessory, Shaft Axis Fittings for DIY RC Model Motors **Brand:** daier **Price:** € 39.69 **Availability:** ✅ In Stock ## Summary > ⚙️ Elevate Your RC Game with Precision Power! ## Quick Answers - **What is this?** daier 4Pcs 3.17mm Flange Coupling Connector, Rigid Guide Model Coupler Accessory, Shaft Axis Fittings for DIY RC Model Motors by daier - **How much does it cost?** € 39.69 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.at](https://www.desertcart.at/products/594603738-daier-4pcs-3-17mm-flange-coupling-connector-rigid-guide-model) ## 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 - • **All-Inclusive DIY Kit:** Includes 4 flange couplings, 8 M3 fastening screws, and a mini hex wrench—everything you need to upgrade your RC model setup. - • **Precision Fit & Finish:** Flawless machining with chamfered guides and smooth internal threads ensures effortless installation and secure shaft alignment. - • **Trusted by Enthusiasts:** Highly rated with a 4.6-star average from 793 reviews, combining quality craftsmanship with user-approved reliability. - • **Versatile Compatibility:** Designed specifically for 3.17mm shaft diameters, perfect for RC airplanes, boats, and custom motor projects. - • **Industrial-Grade Strength:** Crafted from premium 45# steel for unmatched durability and heat resistance, outperforming copper and aluminum alloys. ## Overview The daier 4Pcs 3.17mm Flange Coupling Connector set is a premium accessory kit made from industrial-grade 45# alloy steel, engineered for superior strength and precision. Designed for DIY RC model motors, it features perfectly machined M3 threaded fasteners and chamfered guides for easy installation and stable shaft alignment. This complete kit includes four couplings, eight fastening screws, and a mini hex wrench, making it the go-to upgrade for serious RC enthusiasts seeking durability and flawless performance. ## 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: 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: 3.17mm,Height:12mm,Fixed Hole Screw: M3. - Package included:4Pcs 3.17mm Flange Shaft Coupling + 1Pcs M3 Mini Hex Wrench + 8 x M3 Fastening Screw ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B08333PNZQ | | ASIN | B08333PNZQ | | Brand | daier | | Color | Silver | | Compatible Groove Diameter | 3.17 Millimeters | | Customer Reviews | 4.6 4.6 out of 5 stars (793) | | Customer reviews | 4.6 4.6 out of 5 stars (793) | | Drive Style | External Hex | | Exterior Finish | Aluminum,Copper,Steel | | Fastener Type | Flange | | Finish Types | Brushed | | Grade Rating | industrial | | Inside Thread Size | M3.17 | | Item Diameter | 3.17 Millimeters | | Item model number | H666*4 | | Manufacturer | daier | | Manufacturer | daier | | Material Type | Alloy Steel | | Metal Type | 45# Steel | | Model | H666*4 | | Number of Pieces | 13 | | Package Dimensions | 12.7 x 7.62 x 0.51 cm; 23 g | | Part Number | H666*4 | | Size Name | 3.17mm | | Thread Size | 3.17mm | | Thread Style | Metric | | Thread Type | Iso Metric | ## Product Details - **Colour:** Silver - **Exterior finish:** Aluminum,Copper,Steel - **Fastener type:** Flange - **Material:** Alloy Steel - **Thread size:** 3.17mm ## Images ![daier 4Pcs 3.17mm 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/61OW+F91nxL.jpg) ![daier 4Pcs 3.17mm 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/51Fkqe7bJEL.jpg) ![daier 4Pcs 3.17mm 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/61AjOylsT6L.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 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. ### ⭐⭐⭐⭐⭐ Review *by S***E on 15 December 2025* Arrived as described ## Frequently Bought Together - 4Pcs 3.17mm Flange Coupling Connector, Rigid Guide Model Coupler Accessory, Shaft Axis Fittings for DIY RC Model Motors - Bringsmart 370 Mounting Bracket with Screw Worm Gear Motor Fixed Fastener DIY Parts DC Motor Holder (Single-Side Bracket) - Zeberoxyz 2PCS Set GT2 Synchronous Wheel 20&60 Teeth 5mm Bore Aluminum Timing Pulleys with 2PCS Length 200mm Width 6mm Belt (20-60T-5B-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.at/products/594603738-daier-4pcs-3-17mm-flange-coupling-connector-rigid-guide-model](https://www.desertcart.at/products/594603738-daier-4pcs-3-17mm-flange-coupling-connector-rigid-guide-model) --- *Product available on Desertcart Austria* *Store origin: AT* *Last updated: 2026-04-23*