---
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: "81 zł"
currency: PLN
in_stock: true
reviews_count: 13
category: "Daier"
url: https://www.desertcart.pl/products/179154043-4pcs-8mm-flange-coupling-connector-rigid-guide-model-coupler-accessory
store_origin: PL
region: Poland
---

# M4 hex screw included 8mm precision fit 45# steel durability 4Pcs 8mm Flange Coupling Connector, Rigid Guide Model Coupler Accessory, Shaft Axis Fittings for DIY RC Model Motors

**Brand:** daier
**Price:** 81 zł
**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?** 81 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/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

- • **Alloy Steel Strength:** Crafted from premium 45# steel with heat and electroplated treatment for unmatched toughness and corrosion resistance.
- • **Precision 8mm Shaft Fit:** Engineered for flawless alignment and smooth rotation in your RC models.
- • **Complete Installation Kit:** Includes 4 flange couplings, 8 M4 fastening screws, and a mini hex wrench for effortless assembly.
- • **Versatile RC Compatibility:** Ideal for DIY RC airplanes, boats, and motors—upgrade your build with professional-grade components.
- • **Flawless Machining & Finish:** Chamfered guides and burr-free edges ensure easy installation and long-lasting performance.

## Overview

This 4-piece set of 8mm flange coupling connectors is crafted from durable 45# alloy steel with heat and electroplated finishing, ensuring superior strength and corrosion resistance. Designed for RC model motors, each coupling features precise machining with chamfered guides and smooth threads for easy installation. The package includes all necessary M4 screws and a mini hex wrench, making it a complete, professional-grade upgrade for your DIY RC projects.

## 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 |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #6,504 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #1 in Rigid Set Screw Couplings |
| Brand | daier |
| Color | Silver |
| Customer Reviews | 4.6 4.6 out of 5 stars (813) |
| Cutting Diameter | 8 Millimeters |
| Date First Available | December 24, 2019 |
| Exterior Finish | Aluminum,Steel |
| Fastener Type | Flange, Hex |
| Head Style | Hexagonal |
| Inside Thread Size | M4 |
| Item Diameter | 8 Millimeters |
| Item Package Quantity | 1 |
| Item Weight | 3.87 ounces |
| Item model number | H420*4 |
| Manufacturer | daier |
| Material | Metal |
| Maximum Shear Strength | 370 MPa (53,611 psi) |
| Metal Type | Alloy Steel, Aluminum, Copper |
| Number of Pieces | 4 |
| Part Number | H420*4 |
| Size | 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)
![4Pcs 8mm Flange Coupling Connector, Rigid Guide Model Coupler Accessory, Shaft Axis Fittings for DIY RC Model Motors - Image 2](https://m.media-amazon.com/images/I/61eT3Es2veL.jpg)
![4Pcs 8mm Flange Coupling Connector, Rigid Guide Model Coupler Accessory, Shaft Axis Fittings for DIY RC Model Motors - Image 3](https://m.media-amazon.com/images/I/51oHzBdAY2L.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.

### ⭐⭐⭐⭐⭐ 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 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 Poland*
*Store origin: PL*
*Last updated: 2026-03-20*