--- product_id: 505782342 title: "4Pcs 3.17mm Flange Coupling Connector, Rigid Guide Model Coupler Accessory, Shaft Axis Fittings for DIY RC Model Motors" brand: "daier" price: "56 zł" currency: PLN in_stock: true reviews_count: 8 category: "Daier" url: https://www.desertcart.pl/products/505782342-4pcs-3-17mm-flange-coupling-connector-rigid-guide-model-coupler store_origin: PL region: Poland --- # Precision M3 Fastening Screws 45# Alloy Steel Durability Includes Mini Hex Wrench 4Pcs 3.17mm Flange Coupling Connector, Rigid Guide Model Coupler Accessory, Shaft Axis Fittings for DIY RC Model Motors **Brand:** daier **Price:** 56 zł **Availability:** ✅ In Stock ## Summary > ⚙️ Elevate Your RC Build with Precision & Power! ## Quick Answers - **What is this?** 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?** 56 zł with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/products/505782342-4pcs-3-17mm-flange-coupling-connector-rigid-guide-model-coupler) ## 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 - • **Precision Engineering:** Flawless machining with chamfered guides ensures smooth installation and perfect shaft alignment every time. - • **Top-Rated Reliability:** Trusted by 800+ enthusiasts with a 4.6-star rating, making it the #1 choice in rigid set screw couplings. - • **Complete DIY Ready Kit:** Includes 4 flange couplings, 8 M3 fastening screws, and a mini hex wrench—everything you need to upgrade your RC models instantly. - • **Versatile Compatibility:** Designed specifically for 3.17mm shaft diameters, ideal 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 This 4-piece set of 3.17mm flange coupling connectors is engineered from high-grade 45# alloy steel, offering superior strength and heat resistance. Designed for RC model motors, it features precision machining with chamfered guides for easy installation and stable shaft alignment. The package includes all necessary screws and a mini hex wrench, making it a complete, reliable upgrade favored 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 - 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: Well made and true to advertised dimenions - Great little shaft collars with flanges. Dimensions were accurate and surface finish is good. They worked so well I got a second set. ## 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 | | Best Sellers Rank | #6,312 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #1 in Rigid Set Screw Couplings | | Brand | daier | | Color | Silver | | Compatible Groove Diameter | 3.17 Millimeters | | Customer Reviews | 4.6 out of 5 stars 824 Reviews | | Drive Style | External Hex | | Exterior Finish | Aluminum,Copper,Steel | | Fastener Type | Flange, Hex | | Grade Rating | industrial | | Inside Thread Size | M3 | | Item Diameter | 3.17 Millimeters | | Manufacturer | daier | | Material | Metal | | Material Type | Metal | | Metal Type | Alloy Steel, Aluminum, Copper | | Model | H666*4 | | Number of Pieces | 13 | | Part Number | H666*4 | | Screw Head Style | Flat | | Size Name | 3.17mm | | Thread Class | Coarse | | Thread Size | M 3 | | Thread Style | Right Hand | | Thread Type | Iso Metric | ## Product Details - **Material:** Metal - **Fastener Type:** Flange, Hex - **Thread Size:** M 3 - **Exterior Finish:** Aluminum,Copper,Steel - **Color:** Silver ## Images ![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) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Perfect Machining and Great Design – Each Flange Was Flawless *by R***R on February 10, 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. ### ⭐⭐⭐⭐⭐ Well made and true to advertised dimenions *by D***. on September 30, 2025* Great little shaft collars with flanges. Dimensions were accurate and surface finish is good. They worked so well I got a second set. ### ⭐⭐⭐⭐⭐ Great 5mm flange *by B***N on October 28, 2025* Used these for a small robot. Handles a lot of torque and speed without issue. ## 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.pl/products/505782342-4pcs-3-17mm-flange-coupling-connector-rigid-guide-model-coupler](https://www.desertcart.pl/products/505782342-4pcs-3-17mm-flange-coupling-connector-rigid-guide-model-coupler) --- *Product available on Desertcart Poland* *Store origin: PL* *Last updated: 2026-04-23*