---
product_id: 129681369
title: "4Pcs 8mm Rigid Flange Shaft Coupling Motor Guide Shaft Coupler Connector with Set Screws & Wrench"
brand: "s sydien"
price: "€ 18.14"
currency: EUR
in_stock: true
category: "S Sydien"
url: https://www.desertcart.pt/products/129681369-4pcs-8mm-rigid-flange-shaft-coupling-motor-guide-shaft-coupler
store_origin: PT
region: Portugal
---

# M4 fastening & base screw holes 8mm precision inner diameter Hardened electroplated alloy steel 4Pcs 8mm Rigid Flange Shaft Coupling Motor Guide Shaft Coupler Connector with Set Screws & Wrench

**Brand:** s sydien
**Price:** € 18.14
**Availability:** ✅ In Stock

## Summary

> ⚙️ Lock in precision, power your performance!

## Quick Answers

- **What is this?** 4Pcs 8mm Rigid Flange Shaft Coupling Motor Guide Shaft Coupler Connector with Set Screws & Wrench by s sydien
- **How much does it cost?** € 18.14 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/129681369-4pcs-8mm-rigid-flange-shaft-coupling-motor-guide-shaft-coupler)

## Best For

- s sydien enthusiasts

## Why This Product

- Trusted s sydien brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Low Inertia Design:** Highly sensitive coupling enables rapid state switching without lag
- • **Durable Hardened Alloy:** Heat-treated and electroplated steel resists rust and oil for long-lasting reliability
- • **Versatile Compatibility:** Ideal for RC models, motor shafts, and industrial applications requiring rigid connection
- • **Precision Engineered Fit:** Ensures perfect shaft alignment for seamless motor performance
- • **Complete Installation Kit:** Includes 4 couplings, fastening screws, and a mini hex wrench for effortless setup

## Overview

The S SYDIEN 4Pcs 8mm Rigid Flange Shaft Coupling set features hardened, electroplated alloy steel couplers with M4 fastening screws and a mini hex wrench. Designed for precise shaft alignment and low inertia, these compact couplings deliver durable, rust-resistant performance ideal for RC motors and industrial shaft connections.

## Description

S SYDIEN 4Pcs 8mm Rigid Flange Shaft Coupling Motor Guide Shaft Coupler Connector with Set Screws & Wrench: desertcart.com: Industrial & Scientific

## Features

- Package Content:4Pcs Flange Shaft Couplings with 1Pc Mini Hex Wrench with Some Fastening Screws.Inner Diameter:8mm/0.31''.Fastening Screw Hole:M4.Base Fixing Screw Hole:M4.Cylinder Outer Diameter:16mm/0.63''.Cylinder Height:10mm/0.39''.Base Diameter:32mm/1.26''.Base Height:3mm/0.12''
- HIGH QUALITY:Made of fine plating steel which is hardened by heat treatment and electroplated.Its hardness is more better than ordinary copper and aluminum alloy material. Anti-oil and anti-rust
- LOW INERTIA:Flange shaft couplings is so highly sensitive that can quickly switch the working state
- EXCELLENT PERFORMANCE:Compact structure and small size.It can effectively ensure the alignment of two shafts
- WIDELY USE:Suitable for model shaft connection,perfect accessories for RC model motor,etc

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07R8CJ36F |
| Best Sellers Rank | #284,662 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #110 in Rigid Set Screw Couplings |
| Brand | S SYDIEN |
| Color | 8mm |
| Compatible Groove Diameter | 3.18 millimeters |
| Customer Reviews | 4.6 4.6 out of 5 stars (157) |
| Drive Style | External Hex |
| Exterior Finish | steel |
| Fastener Type | Flange |
| Finish Types | electroplated |
| Grade Rating | industrial |
| Inside Thread Size | M8 |
| Item Diameter | 8 millimeters |
| Item Dimensions | 1.26 inches |
| Manufacturer | Sydien |
| Material Type | Alloy Steel |
| Metal Type | Alloy Steel, Aluminum, Copper |
| Number Of Items | 4 |
| Outside Diameter | 16 millimeters |
| Screw Head Style | Flange |
| Set Name | 4 |
| Size Name | 8mm x 32mm x 10mm x 3mm |
| Thread Class | Fine |
| Thread Size | M 4 |
| Thread Style | Right Hand |
| Thread Type | Iso Metric |
| UPC | 745679813604 |
| Unit Count | 4 Count |

## Product Details

- **Color:** 8mm
- **Exterior Finish:** steel
- **Fastener Type:** Flange
- **Material:** Alloy Steel
- **Thread Size:** M 4

## Images

![4Pcs 8mm Rigid Flange Shaft Coupling Motor Guide Shaft Coupler Connector with Set Screws & Wrench - Image 1](https://m.media-amazon.com/images/I/41LQFz1qSCL.jpg)
![4Pcs 8mm Rigid Flange Shaft Coupling Motor Guide Shaft Coupler Connector with Set Screws & Wrench - Image 2](https://m.media-amazon.com/images/I/31RB3nRpbjL.jpg)
![4Pcs 8mm Rigid Flange Shaft Coupling Motor Guide Shaft Coupler Connector with Set Screws & Wrench - Image 3](https://m.media-amazon.com/images/I/513RPr56OnL.jpg)
![4Pcs 8mm Rigid Flange Shaft Coupling Motor Guide Shaft Coupler Connector with Set Screws & Wrench - Image 4](https://m.media-amazon.com/images/I/51CX2JrXe-L.jpg)
![4Pcs 8mm Rigid Flange Shaft Coupling Motor Guide Shaft Coupler Connector with Set Screws & Wrench - Image 5](https://m.media-amazon.com/images/I/41e8EhnYZeL.jpg)

## Available Options

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

## Questions & Answers

**Q: What are the positions of the 4 holes on the base for the 4mm part? Are there drawings available anywhere?**
A: Dear customer, the inner diameter is 4mm; the outer diameter of the cylinder is 10mm, the height of the cylinder is 10mm, the overall height is 12mm, and the distance between the opposite sides of the base is 16mm. The fixing hole screw is M3, the diameter of the chassis is 22mm, and the height of the chassis is 2mm.

**Q: What is the diameter of the hole pattern (4 holes) for the 5mm model? In other words, the distance between the center of two holes that are opposite**
A: Hello, the diameter of the chassis hole of M5 is 16mm, and the mounting screw of the hole is M3, thank you.

**Q: Why is it so hard to include the dimension for the 4 mounting holes in the product description? I see all the other relevant measurements.**
A: Dear customer, the product has 4 holes, the size is described in the data, please refer to it.

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**Shop now:** [https://www.desertcart.pt/products/129681369-4pcs-8mm-rigid-flange-shaft-coupling-motor-guide-shaft-coupler](https://www.desertcart.pt/products/129681369-4pcs-8mm-rigid-flange-shaft-coupling-motor-guide-shaft-coupler)

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*Product available on Desertcart Portugal*
*Store origin: PT*
*Last updated: 2026-11-13*