---
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: "$31.43"
currency: USD
in_stock: true
reviews_count: 13
category: "Daier"
url: https://www.desertcart.ec/products/179154043-4pcs-8mm-flange-coupling-connector-rigid-guide-model-coupler-accessory
store_origin: EC
region: Ecuador
---

# M4 fastening screws included 8mm precision fit 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:** $31.43
**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?** $31.43 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ec](https://www.desertcart.ec/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

- • **Complete Installation Kit:** Includes 4 couplings, 8 M4 screws, and a mini hex wrench for effortless setup.
- • **Precision 8mm Inner Diameter:** Engineered for seamless shaft alignment and optimal torque transfer.
- • **Premium 45# Steel Construction:** Heat-treated and electroplated for unmatched strength and corrosion resistance.
- • **Versatile RC Model Compatibility:** Perfect for airplanes, boats, robots, and all your DIY motor projects.
- • **Stable & Reliable Shaft Connection:** Rigid flange design minimizes vibration and maximizes performance under load.

## 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 and DIY projects, it includes all necessary M4 screws and a hex wrench for quick installation. Trusted by hobbyists for stable, vibration-free shaft connections that handle high torque and speed.

## Description

Parts for RC Airplane Boat ,DIY Model. Perfect accessories for RC Model motor, etc.

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.
Review: Great 5mm flange - Used these for a small robot. Handles a lot of torque and speed without issue.

## 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 | #4,018 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 (790) |
| 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)

## Available Options

This product comes in different **Size** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ 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.

### ⭐⭐⭐⭐⭐ Fits securely and works well!
*by M***Y on November 19, 2025*

Perfect fit to scale up the axil on small motors

## 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 Ecuador*
*Store origin: EC*
*Last updated: 2026-02-21*