--- product_id: 179154043 title: "4Pcs 8mm Flange Coupling Connector, Rigid Guide Model Coupler Accessory, Shaft Axis Fittings for DIY RC Model Motors" brand: "daier" price: "NT$586" currency: TWD in_stock: true reviews_count: 13 category: "Daier" url: https://www.desertcart.tw/products/179154043-4pcs-8mm-flange-coupling-connector-rigid-guide-model-coupler-accessory store_origin: TW region: Taiwan --- # Precision 8mm Inner Diameter M4 Hex Fastening Screws Included 45# Alloy Steel Durability 4Pcs 8mm Flange Coupling Connector, Rigid Guide Model Coupler Accessory, Shaft Axis Fittings for DIY RC Model Motors **Brand:** daier **Price:** NT$586 **Availability:** ✅ In Stock ## Summary > ⚙️ Lock in precision, power your passion. ## 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?** NT$586 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.tw](https://www.desertcart.tw/products/179154043-4pcs-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# steel with heat and electroplated treatment for superior strength and corrosion resistance. - • **Top-Rated Performance:** Trusted by 800+ enthusiasts with a 4.5-star rating, making it the #1 choice in rigid set screw couplings. - • **Complete DIY Ready Kit:** Includes 4 flange couplings, 8 M4 fastening screws, and a mini hex wrench—everything you need to upgrade your RC model. - • **Versatile Compatibility:** Designed specifically for 8mm shafts, ideal for RC airplanes, boats, and custom motor projects. - • **Engineered for Precision:** Flawless machining with chamfered guides ensures effortless installation and perfect shaft alignment every time. ## Overview This 4-piece 8mm flange coupling set is crafted from high-grade 45# alloy steel, featuring precision machining and chamfered guides for smooth assembly. Designed for RC model motors, it includes M4 hex screws and a mini wrench, delivering durability, stability, and ease of use. Highly rated and widely trusted, it’s the essential upgrade for any serious DIY RC enthusiast. ## 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: 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 | #5,236 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #1 in Rigid Set Screw Couplings | | Brand | daier | | Color | Silver | | Compatible Groove Diameter | 8 Millimeters | | Customer Reviews | 4.5 4.5 out of 5 stars (838) | | Drive Style | External Hex | | Exterior Finish | Aluminum,Steel | | Fastener Type | Flange, Hex | | Grade Rating | commercial | | Inside Thread Size | M4 | | Item Diameter | 8 Millimeters | | Item Weight | 0.11 Kilograms | | Manufacturer | daier | | Material Type | Metal | | Maximum Shear Strength | 370 MPa (53,611 psi) | | Metal Type | Alloy Steel, Aluminum, Copper | | Model | H420*4 | | Number of Pieces | 4 | | Part Number | H420*4 | | Screw Head Style | Hexagonal | | Size Name | 8mm | | Thread Class | Class 6H | | Thread Size | M 4 | | Thread Style | Left Hand | | Thread Type | Iso Metric | ## Product Details - **Color:** Silver - **Exterior Finish:** Aluminum,Steel - **Fastener Type:** Flange, Hex - **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) ## Available Options This product comes in different **Size** options. ## 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. ### ⭐⭐⭐⭐⭐ Inexpensive Metal flanges seem well made and come with screws and allen wrench *by T***H on May 9, 2025* I needed a flange for mounting a plastic fan unit that came with a flimsy flange molded in, that had failed. I dremelled out the old flange and added one of these metal flanges attaching it with screws and glue Bonus It comes with an allen wrench of the right size for the tiny set screws supplied ## 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.tw/products/179154043-4pcs-8mm-flange-coupling-connector-rigid-guide-model-coupler-accessory](https://www.desertcart.tw/products/179154043-4pcs-8mm-flange-coupling-connector-rigid-guide-model-coupler-accessory) --- *Product available on Desertcart Taiwan* *Store origin: TW* *Last updated: 2026-04-23*