--- product_id: 186319476 title: "4Pcs 4mm Flange Coupling Connector, Rigid Guide Model Coupler Accessory, Shaft Axis Fittings for DIY RC Model Motors" brand: "daier" price: "SAR 40" currency: SAR in_stock: true reviews_count: 13 category: "Daier" url: https://www.desertcart.com.sa/products/186319476-4pcs-4mm-flange-coupling-connector-rigid-guide-model-coupler-accessory store_origin: SA region: Saudi Arabia --- # M3 Fastening Screws - Secure Fit 45# Alloy Steel - Superior Strength Includes Mini Hex Wrench - Ready to Install 4Pcs 4mm Flange Coupling Connector, Rigid Guide Model Coupler Accessory, Shaft Axis Fittings for DIY RC Model Motors **Brand:** daier **Price:** SAR 40 **Availability:** ✅ In Stock ## Summary > ⚙️ Elevate Your RC Builds with Precision Power! ## Quick Answers - **What is this?** 4Pcs 4mm Flange Coupling Connector, Rigid Guide Model Coupler Accessory, Shaft Axis Fittings for DIY RC Model Motors by daier - **How much does it cost?** SAR 40 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.com.sa](https://www.desertcart.com.sa/products/186319476-4pcs-4mm-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 - • **Top-Rated Reliability:** Ranked #1 in Rigid Set Screw Couplings with 4.5-star reviews from 871 enthusiasts. - • **Complete DIY Ready Kit:** Includes 4 flange couplings, 8 fastening screws, and a mini hex wrench for instant use. - • **Optimized for RC Model Motors:** Perfectly sized 4mm inner diameter and M3 screw holes for stable shaft alignment. - • **Precision Engineered for Flawless Fit:** Chamfered guides and smooth internal threads ensure effortless assembly and zero burrs. - • **Industrial-Grade 45# Steel Construction:** Outperforms copper and aluminum alloys for unmatched durability and heat resistance. ## Overview This 4-piece 4mm flange coupling connector set, crafted from industrial-grade 45# alloy steel, offers superior strength and heat resistance for RC model motors. Featuring chamfered guides and M3 fastening screws, it ensures a secure, burr-free fit. The package includes all necessary hardware and a mini hex wrench, making it a top-rated, ready-to-install solution for DIY enthusiasts seeking professional-grade shaft alignment. ## 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: These fit small gear drives - Nice product ## 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: 4mm,Height:12mm,Fixed Hole Screw: M3. - Package included:4Pcs 4mm Flange Shaft Coupling + 1Pcs M3 Mini Hex Wrench + 8 x M3 Fastening Screw ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B08334VLZG | | Best Sellers Rank | #6,392 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #1 in Rigid Set Screw Couplings | | Brand | daier | | Color | Silver | | Compatible Groove Diameter | 4 Millimeters | | Customer Reviews | 4.5 out of 5 stars 871 Reviews | | Drive Style | External Hex | | Exterior Finish | Aluminum | | Fastener Type | Flange, Hex | | Finish Types | Unfinished | | Grade Rating | Industrial | | Inside Thread Size | M3 | | Item Diameter | 4 Millimeters | | Item Dimensions | 1.97 x 0.59 x 1.57 inches | | Item Weight | 30 Grams | | Manufacturer | daier | | Material | Metal | | Material Type | Metal | | Maximum Shear Strength | [INFERRED: Higher than aluminum or copper alloys] | | Metal Type | Alloy Steel | | Model | H416*4 | | Number Of Items | 4 | | Number of Pieces | 4 | | Part Number | H416*4 | | Screw Head Style | Flat | | Set Name | 4mm Flange Coupling Connector Set (4 Pieces + Tools) | | Size Name | 4mm | | Thread Class | M3 | | Thread Coverage | M3 | | Thread Size | m3 | | Thread Style | Right Hand | | Thread Type | Iso Metric | ## Product Details - **Color:** Silver - **Exterior Finish:** Aluminum - **Fastener Type:** Flange, Hex - **Material:** Metal - **Thread Size:** m3 ## Images ![4Pcs 4mm 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/61PprJJW0AL.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. ### ⭐⭐⭐⭐⭐ These fit small gear drives *by S***. on April 22, 2026* Nice product ### ⭐⭐⭐⭐⭐ Work great *by Z***A on May 21, 2026* Worked as advertised ## Frequently Bought Together - 4Pcs 4mm Flange Coupling Connector, Rigid Guide Model Coupler Accessory, Shaft Axis Fittings for DIY RC Model Motors - DC 12V Reversible High Reduction Electric Motor 15-200RPM Outer Diameter 20MM(200RPM) --- ## 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.com.sa/products/186319476-4pcs-4mm-flange-coupling-connector-rigid-guide-model-coupler-accessory](https://www.desertcart.com.sa/products/186319476-4pcs-4mm-flange-coupling-connector-rigid-guide-model-coupler-accessory) --- *Product available on Desertcart Saudi Arabia* *Store origin: SA* *Last updated: 2026-07-04*