---
product_id: 33757510
title: "4mm to 4mm Universal Joint Coupling RC Robot Boat Shaft Motor Connector Coupler"
brand: "zjtek"
price: "€ 40.39"
currency: EUR
in_stock: true
url: https://www.desertcart.fr/products/33757510-4mm-to-4mm-universal-joint-coupling-rc-robot-boat-shaft
store_origin: FR
region: France
---

# Universal compatibility Stainless steel durability 4mm precision 4mm to 4mm Universal Joint Coupling RC Robot Boat Shaft Motor Connector Coupler

**Brand:** zjtek
**Price:** € 40.39
**Availability:** ✅ In Stock

## Summary

> 🔗 Connect with Confidence!

## Quick Answers

- **What is this?** 4mm to 4mm Universal Joint Coupling RC Robot Boat Shaft Motor Connector Coupler by zjtek
- **How much does it cost?** € 40.39 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.fr](https://www.desertcart.fr/products/33757510-4mm-to-4mm-universal-joint-coupling-rc-robot-boat-shaft)

## Best For

- zjtek enthusiasts

## Why This Product

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

## Key Features

- • **Metric Measurement:** Designed for precision with a 4mm measurement system.
- • **No Batteries Needed:** Enjoy hassle-free operation without the need for batteries.
- • **Robust Construction:** Crafted from high-quality stainless steel for long-lasting performance.
- • **Seamless Connectivity:** Experience effortless integration with your RC robot boat.
- • **Versatile Application:** Perfect for various RC projects, ensuring you stay ahead of the curve.

## Overview

The 4mm to 4mm Universal Joint Coupling is a high-quality stainless steel connector designed for seamless integration in RC robot boats. With its robust construction and metric precision, this coupling ensures reliable performance without the need for batteries, making it an essential component for any RC enthusiast.

## Description

Features: 4MM to 4MM universal joint coupling Material: Stainless steel Color: Silver Product Range: Metal joint suited to use direct axis motor, suitable for model cars, model ships, robots, and other metal adapter to use. Size: 4mm To 4mm Hole Diameter: one hole diameter is 4mm,the other is 4mm Universal Joint Outside Diameter:9m Universal Joint Length:23mm Screw Size: M3 Package include: 1pc 4mm to 4mm Universal joint coupling

## Features

- 4MM to 4MM universal joint coupling

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | ZJ-LLC |
| Part Number | B1F5 |
| Is Discontinued By Manufacturer | No |
| Color | Silver |
| Material | stainless steel |
| Number Of Pieces | 1 |
| Measurement System | metric |
| Batteries Included? | No |
| Batteries Required? | No |

## Images

![4mm to 4mm Universal Joint Coupling RC Robot Boat Shaft Motor Connector Coupler - Image 1](https://m.media-amazon.com/images/I/51SN59s1qvL.jpg)
![4mm to 4mm Universal Joint Coupling RC Robot Boat Shaft Motor Connector Coupler - Image 2](https://m.media-amazon.com/images/I/51qobF-UrDL.jpg)
![4mm to 4mm Universal Joint Coupling RC Robot Boat Shaft Motor Connector Coupler - Image 3](https://m.media-amazon.com/images/I/41bcwpx4RyL.jpg)

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**Shop now:** [https://www.desertcart.fr/products/33757510-4mm-to-4mm-universal-joint-coupling-rc-robot-boat-shaft](https://www.desertcart.fr/products/33757510-4mm-to-4mm-universal-joint-coupling-rc-robot-boat-shaft)

---

*Product available on Desertcart France*
*Store origin: FR*
*Last updated: 2026-09-16*