---
product_id: 504894953
title: "ruthex M4 Threaded Inserts - 50 Pieces RX-M4x8.1 Brass Heat Set Insert for Pl..."
brand: "ruthex"
price: "79 zł"
currency: PLN
in_stock: true
reviews_count: 13
category: "Ruthex"
url: https://www.desertcart.pl/products/504894953-ruthex-m4-threaded-inserts-50-pieces-rx-m4x8-1-brass
store_origin: PL
region: Poland
---

# Heat Set Application M4 Internal Thread Reusable Design ruthex M4 Threaded Inserts - 50 Pieces RX-M4x8.1 Brass Heat Set Insert for Pl...

**Brand:** ruthex
**Price:** 79 zł
**Availability:** ✅ In Stock

## Summary

> 🔩 Elevate Your 3D Printing Game with Ruthex Inserts!

## Quick Answers

- **What is this?** ruthex M4 Threaded Inserts - 50 Pieces RX-M4x8.1 Brass Heat Set Insert for Pl... by ruthex
- **How much does it cost?** 79 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/504894953-ruthex-m4-threaded-inserts-50-pieces-rx-m4x8-1-brass)

## Best For

- ruthex enthusiasts

## Why This Product

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

## Key Features

- • **⚙️ Easy Installation:** Effortlessly embed these inserts using heat or ultrasound, simplifying your 3D printing process.
- • **📦 Convenient Set of 50:** Get 50 M4 threaded inserts in one package, ensuring you have enough for all your creative endeavors.
- • **🔧 Firm & Reliable Hold:** Experience unmatched stability with our spiral-shaped knurled nuts, ensuring a secure grip in your 3D printed parts.
- • **🛠️ Versatile Compatibility:** Designed for all thermoplastics, including PLA, PETG, and ABS, making them perfect for any 3D printing project.
- • **🌡️ Superior Thermal Conductivity:** Crafted from lead-free brass, these inserts offer excellent thermal conductivity and corrosion resistance for long-lasting performance.

## Overview

The ruthex M4 Threaded Inserts are a set of 50 lead-free brass heat set inserts designed for easy application in various thermoplastics. With a robust internal thread and excellent thermal conductivity, these inserts provide a reliable and reusable solution for enhancing the durability of your 3D printed components.

## Description

Product description

Review: High-Quality Heat Inserts - Overall, I’m very happy with these heat inserts. They shipped quickly and arrived in good condition with no issues. In use, the machining appears to be high quality and the knurling is clean and consistent. Screws thread in smoothly without binding or cross-threading. I primarily use these for 3D printed parts and have not experienced any fitment or durability problems. They perform exactly as expected and I would recommend them to anyone installing threaded inserts in 3D prints.
Review: Great product - Sizing was spot on for Sherpa heavy build. Easy to use and strong hold.

## Features

- M4 THREADED INSERTS FOR YOUR 3D PRINTED PARTS: The ruthex threaded nuts can be retrofitted by heat or ultrasound into parts of 3D printers from e.g. Anycubic or Prusa. With the help of heat from a soldering iron or ultrasonic, the insert nuts are simply embedded in a blind- or through hole
- FIRM HOLDING WITH EASY APPLICATION: Thanks to the geometry of the threaded sleeve, it firmly holds in the pressure part. The opposing spiral-shaped knurled nuts ensure a high balanced tightening and loosening torque, as well as a high tightening force. Through the guide, insertion has been greatly simplified
- STABLE & LONG-LASTING THREAD INSERTS: The inserts with internal thread lead free brass, which ensures optimum corrosion resistance and thermal conductivity. thermal conductivity. This means that each insert nut can be used for a long time and is easy to use. The reusability of the insert nut is also possible by carefully removing them from the pressure part when they are no longer needed
- SUITABLE FOR A VARIETY OF PLASTICS: The inserts are designed for all thermoplastics. For example, the knurled nuts hold in PLA, PETG, ABS, PPS, PP and many more. As soon as the plastic of the part around the brass sleeve cools and hardens, the threaded sleeve is firmly anchored
- PRACTICAL THREAD INSERT SET: The ruthex threaded inserts set are lead free and RX-M4x8,1 consists of 50 insert nuts with M4 internal thread and a length of 8.1 mm. The threaded sleeves can be inserted by ultrasonic and heat embedding

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07YSV66Y5 |
| Best Sellers Rank | #1,116 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #1 in Nut Inserts |
| Brand | ruthex |
| Color | Metric Threaded Insert |
| Compatible Groove Diameter | 4.25 Millimeters |
| Customer Reviews | 4.8 out of 5 stars 4,208 Reviews |
| Drive Style | Spline |
| Exterior Finish | Brass |
| Fastener Type | Insert |
| Finish Types | Brass |
| Global Trade Identification Number | 04260528720910 |
| Grade Rating | Industrial |
| Inside Thread Size | M4 x 8 1 |
| Item Diameter | 66 Millimeters |
| Item Dimensions | 3.82 x 2.6 x 0.35 inches |
| Manufacturer | ruthex |
| Material | Brass |
| Material Type | Brass |
| Maximum Shear Strength | mittlere bis hohe Scherfestigkeit |
| Metal Type | Brass |
| Model | GE-M4x81-001 |
| Number Of Items | 1 |
| Number of Pieces | 50 |
| Part Number | GE-M4x81-001 |
| Screw Head Style | trapezoidal |
| Size Name | M4x8.1 (50pcs) |
| Thread Class | Class 9.6 |
| Thread Coverage | Fully Threaded |
| Thread Size | M4 x 8.1 |
| Thread Style | Right Hand |
| Thread Type | Metric |
| Unit Count | 1.7637 Ounce |

## Product Details

- **Material:** Brass
- **Fastener Type:** Insert
- **Thread Size:** M4 x 8.1
- **Exterior Finish:** Brass
- **Color:** Metric Threaded Insert

## Images

![ruthex M4 Threaded Inserts - 50 Pieces RX-M4x8.1 Brass Heat Set Insert for Pl... - Image 1](https://m.media-amazon.com/images/I/71T1rovo1LL.jpg)
![ruthex M4 Threaded Inserts - 50 Pieces RX-M4x8.1 Brass Heat Set Insert for Pl... - Image 2](https://m.media-amazon.com/images/I/81pKWAOJdoL.jpg)
![ruthex M4 Threaded Inserts - 50 Pieces RX-M4x8.1 Brass Heat Set Insert for Pl... - Image 3](https://m.media-amazon.com/images/I/717LH8yMKsL.jpg)
![ruthex M4 Threaded Inserts - 50 Pieces RX-M4x8.1 Brass Heat Set Insert for Pl... - Image 4](https://m.media-amazon.com/images/I/71od3QUANkL.jpg)
![ruthex M4 Threaded Inserts - 50 Pieces RX-M4x8.1 Brass Heat Set Insert for Pl... - Image 5](https://m.media-amazon.com/images/I/71ntgYcJImL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ High-Quality Heat Inserts
*by M***S on February 14, 2026*

Overall, I’m very happy with these heat inserts. They shipped quickly and arrived in good condition with no issues. In use, the machining appears to be high quality and the knurling is clean and consistent. Screws thread in smoothly without binding or cross-threading. I primarily use these for 3D printed parts and have not experienced any fitment or durability problems. They perform exactly as expected and I would recommend them to anyone installing threaded inserts in 3D prints.

### ⭐⭐⭐⭐⭐ Great product
*by M***N on March 20, 2026*

Sizing was spot on for Sherpa heavy build. Easy to use and strong hold.

### ⭐⭐⭐⭐⭐ Ken
*by K***N on April 16, 2026*

These inserts worked great for my 3d print they fit perfectly and were very easy to install and definitely hold strong I used these inserts on petg filament I have put it to the test and so far they haven't gave out just try not to over torque them ..

## Frequently Bought Together

- ruthex M4 Threaded Inserts - 50 Pieces RX-M4x8.1 Brass Heat Set Insert for Plastic Parts - Metric knurled Nuts - Insert by Heat into 3D Printing Components
- ruthex 7x Soldering Tips/Heat-Set Insert Tips - for Thread Inserts M2 / M2.5 / M3 / M4 / M5 / M6 / M8 - #2-56 / #4-40 / #8-32/ #10-24 1/4" and Soldering Iron Adapter 900M / T18
- Kadrick Metric Screws Assortment,270 Pcs M4 Screw Kit,Hex Socket Head Cap Bolts, M4*6mm/8mm/12mm/16mm/20mm/30mm Screws Nuts and Washers, 12.9 Grade Alloy Steel,Black Zinc Plated,Anti Rust Upgrade

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**Shop now:** [https://www.desertcart.pl/products/504894953-ruthex-m4-threaded-inserts-50-pieces-rx-m4x8-1-brass](https://www.desertcart.pl/products/504894953-ruthex-m4-threaded-inserts-50-pieces-rx-m4x8-1-brass)

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*Product available on Desertcart Poland*
*Store origin: PL*
*Last updated: 2026-05-25*