---
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: "€ 31.06"
currency: EUR
in_stock: true
reviews_count: 5
category: "Daier"
url: https://www.desertcart.it/products/729018606-4pcs-8mm-flange-coupling-connector-rigid-guide-model-coupler-accessory
store_origin: IT
region: Italy
---

# 8mm Inner Diameter - Perfect Fit M4 Hex Screws - Precision Fastening 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:** € 31.06
**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?** € 31.06 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.it](https://www.desertcart.it/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

- • **Flawless Craftsmanship:** Chamfered guides and smooth internal threads guarantee easy screw insertion and long-lasting reliability.
- • **Engineered for Precision:** Crafted from premium 45# steel with electroplated finish for unmatched durability and corrosion resistance.
- • **Seamless Shaft Alignment:** Rigid flange design ensures stable, wobble-free coupling for your RC motors and DIY projects.
- • **Complete Installation Kit:** Includes 4 flange couplings, 8 M4 fastening screws, and a mini hex wrench for effortless assembly.
- • **Optimized for DIY Enthusiasts:** Perfectly sized 8mm inner diameter and M4 screw holes tailored for model shafts and RC applications.

## Overview

This 4-piece set of 8mm flange coupling connectors, made from high-grade 45# alloy steel with an electroplated finish, offers superior strength and corrosion resistance. Designed specifically for RC model motors and DIY shaft fittings, it includes all necessary screws and a mini hex wrench for quick, precise installation. Engineered for flawless alignment and durability, these couplers elevate your model-building experience with professional-grade reliability.

## 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: 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 |
| ASIN  | B08335MYGW |
| Brand | daier |
| Color | Silver |
| Compatible Groove Diameter | 4 Millimeters |
| Customer Reviews | 4.6 4.6 out of 5 stars (781) |
| Customer reviews | 4.6 4.6 out of 5 stars (781) |
| Drive Style | External Hex |
| Exterior Finish | Aluminum,Steel |
| Fastener Type | Flange |
| Finish Types | Electroplated |
| Grade Rating | commercial |
| Inside Thread Size | M4 |
| Item Diameter | 8 Millimeters |
| Item Weight | 0.11 Kilograms |
| Item model number  | H420*4 |
| Manufacturer | daier |
| Manufacturer  | daier |
| Material Type | Metal |
| Maximum Shear Strength | 370 MPa (53,611 psi) |
| Metal Type | Alloy Steel |
| Model | H420*4 |
| Number of Pieces | 4 |
| Package Dimensions  | 9.4 x 8.3 x 3.9 cm; 110 g |
| 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 |

## 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)

## 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

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*Product available on Desertcart Italy*
*Store origin: IT*
*Last updated: 2026-03-19*