---
product_id: 505782342
title: "4Pcs 3.17mm Flange Coupling Connector, Rigid Guide Model Coupler Accessory, Shaft Axis Fittings for DIY RC Model Motors"
brand: "daier"
price: "163 kr"
currency: NOK
in_stock: true
reviews_count: 13
category: "Daier"
url: https://www.desertcart.no/products/505782342-4pcs-3-17mm-flange-coupling-connector-rigid-guide-model-coupler
store_origin: NO
region: Norway
---

# 3.17mm precision inner diameter M3 fastening screws for secure fit 45# steel for ultimate durability 4Pcs 3.17mm Flange Coupling Connector, Rigid Guide Model Coupler Accessory, Shaft Axis Fittings for DIY RC Model Motors

**Brand:** daier
**Price:** 163 kr
**Availability:** ✅ In Stock

## Summary

> ⚙️ Elevate your RC builds with precision power and pro-grade durability!

## Quick Answers

- **What is this?** 4Pcs 3.17mm Flange Coupling Connector, Rigid Guide Model Coupler Accessory, Shaft Axis Fittings for DIY RC Model Motors by daier
- **How much does it cost?** 163 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.no](https://www.desertcart.no/products/505782342-4pcs-3-17mm-flange-coupling-connector-rigid-guide-model-coupler)

## 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 DIY Ready Kit:** Includes 4 flange couplings, 8 M3 screws, and a mini hex wrench—everything you need to upgrade instantly.
- • **Versatile Compatibility:** Perfectly engineered for RC model motors, airplanes, boats, and other DIY shaft axis projects.
- • **Precision Fit Guaranteed:** Exact 3.17mm inner diameter ensures seamless shaft alignment and smooth motor performance.
- • **Industrial-Grade Strength:** Crafted from premium 45# steel with heat and electroplated finish for unmatched durability and insulation.
- • **Effortless Installation & Replacement:** Rigid guide design stabilizes shafts while making assembly and maintenance quick and hassle-free.

## Overview

This 4-piece flange coupling connector set features industrial-grade 45# steel construction with a heat and electroplated finish, ensuring superior strength and insulation. Designed with a precise 3.17mm inner diameter and M3 fastening screws, it offers a secure, stable connection ideal for RC model motors and DIY projects. The package includes all necessary hardware and a mini hex wrench for easy installation, making it a must-have upgrade for serious hobbyists seeking reliable performance and longevity.

## Description

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

Review: Precise - Very good quality. Would highly recommend.
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: 3.17mm,Height:12mm,Fixed Hole Screw: M3.
- Package included:4Pcs 3.17mm Flange Shaft Coupling + 1Pcs M3 Mini Hex Wrench + 8 x M3 Fastening Screw

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08333PNZQ |
| Best Sellers Rank | #7,857 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #1 in Rigid Set Screw Couplings |
| Brand | daier |
| Color | Silver |
| Compatible Groove Diameter | 3.17 millimeters |
| Customer Reviews | 4.5 out of 5 stars 907 Reviews |
| Drive Style | External Hex |
| Exterior Finish | Aluminum,Copper,Steel |
| Fastener Type | Flange, Hex |
| Finish Types | Brushed |
| Grade Rating | industrial |
| Inside Thread Size | M3 |
| Item Diameter | 3.17 millimeters |
| Manufacturer | daier |
| Material | Metal |
| Material Type | Metal |
| Metal Type | Alloy Steel, Aluminum, Copper |
| Model | H666*4 |
| Number Of Items | 4 |
| Number of Packs | 4 |
| Number of Pieces | 4 |
| Part Number | H666*4 |
| Screw Head Style | Flat |
| Set Name | 4-Piece Flange Coupling Connector Set |
| Size Name | 3.17mm |
| Thread Class | Coarse |
| Thread Size | M 3 |
| Thread Style | Right Hand |
| Thread Type | Iso Metric |
| Unit Count | 4 Count |

## Product Details

- **Color:** Silver
- **Exterior Finish:** Aluminum,Copper,Steel
- **Fastener Type:** Flange, Hex
- **Material:** Metal
- **Thread Size:** M 3

## Images

![4Pcs 3.17mm 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/61OW+F91nxL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Precise
*by M***1 on July 27, 2026*

Very good quality. Would highly recommend.

### ⭐⭐⭐⭐⭐ 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

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**Shop now:** [https://www.desertcart.no/products/505782342-4pcs-3-17mm-flange-coupling-connector-rigid-guide-model-coupler](https://www.desertcart.no/products/505782342-4pcs-3-17mm-flange-coupling-connector-rigid-guide-model-coupler)

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*Product available on Desertcart Norway*
*Store origin: NO*
*Last updated: 2026-09-18*