---
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: "€ 18.91"
currency: EUR
in_stock: true
reviews_count: 13
category: "Daier"
url: https://www.desertcart.at/products/179154043-4pcs-8mm-flange-coupling-connector-rigid-guide-model-coupler-accessory
store_origin: AT
region: Austria
---

# M4 Hex Fastening Screws 45# Alloy Steel Strength Precision Machined Fit 4Pcs 8mm Flange Coupling Connector, Rigid Guide Model Coupler Accessory, Shaft Axis Fittings for DIY RC Model Motors

**Brand:** daier
**Price:** € 18.91
**Availability:** ✅ In Stock

## Summary

> ⚙️ Elevate Your RC Builds with Precision & Power!

## 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?** € 18.91 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/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 electroplated finish for superior strength and corrosion resistance.
- • **Precision Engineering:** Flawless machining with chamfered guides ensures smooth installation and perfect shaft alignment every time.
- • **Top-Rated Performance:** Rated #1 in Rigid Set Screw Couplings with 4.5-star reviews from 899+ satisfied professionals.
- • **Complete DIY Ready Kit:** Includes 4 flange couplings, 8 M4 fastening screws, and a mini hex wrench for hassle-free assembly.
- • **Versatile Compatibility:** Designed specifically for 8mm shaft diameters, ideal for RC models, DIY motors, and small gear drives.

## Overview

This 4-piece 8mm flange coupling set, made from high-grade 45# alloy steel with an electroplated finish, offers exceptional durability and precision for RC model motors and DIY projects. Featuring M4 hex screws and a mini wrench, it ensures easy installation and reliable shaft alignment, making it the top choice for professionals seeking robust and flawless shaft couplers.

## 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: 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 | #7,054 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 out of 5 stars 899 Reviews |
| Drive Style | External Hex |
| Exterior Finish | Aluminum,Steel |
| Fastener Type | Flange, Hex |
| Finish Types | Electroplated |
| Grade Rating | commercial |
| Inside Thread Size | M4 |
| Item Diameter | 8 millimeters |
| Item Weight | 0.11 kg |
| Manufacturer | daier |
| Material | Metal |
| Material Type | Metal |
| Maximum Shear Strength | 370 MPa (53,611 psi) |
| Metal Type | Alloy Steel |
| Model | H420*4 |
| Number Of Items | 4 |
| Number of Pieces | 4 |
| Part Number | H420*4 |
| Screw Head Style | Hexagonal |
| Set Name | 8mm Flange Shaft Coupling Set (4 Piece) |
| 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.

### ⭐⭐⭐⭐⭐ These fit small gear drives
*by S***. on April 22, 2026*

Nice product

### ⭐⭐⭐⭐⭐ Screws fall out but nothing some Loctite can't fix!
*by M***M on June 12, 2026*

They seem to work great if you add Loctite or super glue to the little screws, they tend to fall out. I think it is because the hole the screws screw into are a bit larger than it should be so it goes in loose. Without extra reinforcement the screw will fall out. The look well machined, seem to be durable, easy enough to install after you fix them up, good value for what I paid!

## Frequently Bought Together

- 4Pcs 8mm Flange Coupling Connector, Rigid Guide Model Coupler Accessory, Shaft Axis Fittings for DIY RC Model Motors
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*Product available on Desertcart Austria*
*Store origin: AT*
*Last updated: 2026-08-03*