---
product_id: 494677929
title: "ruthex M3 Threaded Inserts - 100 Pieces RX-M3x5.7 Brass Heat Set Insert for P..."
brand: "ruthex"
price: "236 kr"
currency: NOK
in_stock: true
reviews_count: 13
category: "Ruthex"
url: https://www.desertcart.no/products/494677929-ruthex-m3-threaded-inserts-100-pieces-rx-m3x5-7-brass
store_origin: NO
region: Norway
---

# Heat/ultrasonic embed tech M3 internal thread precision 100-piece professional set ruthex M3 Threaded Inserts - 100 Pieces RX-M3x5.7 Brass Heat Set Insert for P...

**Brand:** ruthex
**Price:** 236 kr
**Availability:** ✅ In Stock

## Summary

> 🔧 Upgrade your 3D prints with threaded precision that sticks like a pro!

## Quick Answers

- **What is this?** ruthex M3 Threaded Inserts - 100 Pieces RX-M3x5.7 Brass Heat Set Insert for P... by ruthex
- **How much does it cost?** 236 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/494677929-ruthex-m3-threaded-inserts-100-pieces-rx-m3x5-7-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

- • **Bulk 100-Piece Set:** Stock up with a high-value pack designed for serious makers and professional prototypers.
- • **Precision M3 Threading:** Engineered for flawless fit in 3D printed parts, ensuring reliable fastening every time.
- • **Superior Brass Durability:** Corrosion-resistant brass guarantees long-lasting strength and excellent thermal conductivity.
- • **Heat & Ultrasonic Installation:** Seamlessly embed inserts with soldering iron or ultrasonic tools for a clean, professional finish.
- • **Universal Plastic Compatibility:** Perfectly anchors in PLA, PETG, ABS, and more—versatility that keeps your projects future-proof.

## Overview

The ruthex M3 Threaded Inserts are a premium set of 100 brass knurled nuts designed for heat or ultrasonic embedding into thermoplastic 3D printed parts. Featuring M3 internal threading and corrosion-resistant brass, these inserts provide a durable, reusable, and high-torque fastening solution compatible with popular plastics like PLA, PETG, and ABS. Ideal for professional makers and engineers seeking reliable, long-lasting thread reinforcement in their prototypes and production components.

## Description

ruthex M3 Threaded Inserts - 100 Pieces RX-M3x5.7 Brass Heat Set Insert for Plastic Parts - Metric knurled Nuts - Insert by Heat into 3D Printing Components: desertcart.com: Tools & Home Improvement

Review: This is the only brand to buy, consistently perfect. Never fail. - Buy these, no matter what. You’ll regret buying from others, promise. I use thousands of these for my products for customers. They are essential to my business. I recently tried to buy another brand that was a little cheaper and it was a bad mistake. About half of them have damaged or defected threads, but you don’t know until after you try a screw in them. This has caused me many failed prints, a lot of money wasted. All because I tried to save a few bucks. I will never go to any other brand, this is literally the only one I trust. I don’t leave reviews, but after the nightmare with the other brand that starts with a U, I felt it was imperative I help out others. Don’t buy anything else.
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.

## Features

- M3 THREAD 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
- FIXED HOLD WITH EASY APPLICATION: Thanks to the geometry of the threaded sleeve, the threaded sleeve holds it firmly in the pressure part. The opposing spiral-shaped knurled nuts ensure a balanced high tightening and loosening torque, as well as a high tightening force. The guide has made insertion much easier
- STABLE & LONG-LASTING THREAD INSERTS: The inserts with internal thread brass, which ensures optimum corrosion resistance and 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 thread insert set are lead free RX-M3x5,7 consists of 100 insert nuts with M3 internal thread and a length of 5.7 mm. The threaded sleeves can be inserted by ultrasonic and heat embedding

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08BCRZZS3 |
| Best Sellers Rank | #1,446 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #1 in Nut Inserts |
| Brand | ruthex |
| Color | Metric Threaded Insert |
| Compatible Groove Diameter | 3.5 millimeters |
| Customer Reviews | 4.8 out of 5 stars 1,532 Reviews |
| Drive Style | Spline |
| Exterior Finish | Brass |
| Fastener Type | Insert |
| Finish Types | Brass |
| Grade Rating | Industrial |
| Inside Thread Size | M3 |
| Item Diameter | 3 millimeters |
| Item Dimensions | 4.72 x 3.54 x 0.39 inches |
| Manufacturer | ruthex |
| Material | Brass |
| Material Type | Brass |
| Metal Type | Brass |
| Model | GE-M3x57-001 |
| Number Of Items | 100 |
| Number of Pieces | 100 |
| Outside Diameter | 3 millimeters |
| Part Number | GE-M3x57-001 |
| Screw Head Style | Flat |
| Set Name | ruthex M3 Threaded Inserts - 100 Pieces RX-M3x5.7 |
| Size Name | M3x5.7 (100pcs) |
| Thread Class | Class 2A |
| Thread Coverage | Fully Threaded |
| Thread Size | M3 |
| Thread Style | Right Hand |
| Thread Type | Straight |
| Unit Count | 100 Count |

## Product Details

- **Color:** Metric Threaded Insert
- **Exterior Finish:** Brass
- **Fastener Type:** Insert
- **Material:** Brass
- **Thread Size:** M3

## Images

![ruthex M3 Threaded Inserts - 100 Pieces RX-M3x5.7 Brass Heat Set Insert for P... - Image 1](https://m.media-amazon.com/images/I/717sikDXLoL.jpg)
![ruthex M3 Threaded Inserts - 100 Pieces RX-M3x5.7 Brass Heat Set Insert for P... - Image 2](https://m.media-amazon.com/images/I/81pKWAOJdoL.jpg)
![ruthex M3 Threaded Inserts - 100 Pieces RX-M3x5.7 Brass Heat Set Insert for P... - Image 3](https://m.media-amazon.com/images/I/717LH8yMKsL.jpg)
![ruthex M3 Threaded Inserts - 100 Pieces RX-M3x5.7 Brass Heat Set Insert for P... - Image 4](https://m.media-amazon.com/images/I/71od3QUANkL.jpg)
![ruthex M3 Threaded Inserts - 100 Pieces RX-M3x5.7 Brass Heat Set Insert for P... - Image 5](https://m.media-amazon.com/images/I/71ntgYcJImL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ This is the only brand to buy, consistently perfect. Never fail.
*by T***R on August 15, 2025*

Buy these, no matter what. You’ll regret buying from others, promise. I use thousands of these for my products for customers. They are essential to my business. I recently tried to buy another brand that was a little cheaper and it was a bad mistake. About half of them have damaged or defected threads, but you don’t know until after you try a screw in them. This has caused me many failed prints, a lot of money wasted. All because I tried to save a few bucks. I will never go to any other brand, this is literally the only one I trust. I don’t leave reviews, but after the nightmare with the other brand that starts with a U, I felt it was imperative I help out others. Don’t buy anything else.

### ⭐⭐⭐⭐⭐ 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.

### ⭐⭐⭐⭐⭐ Cant recommend enough
*by C***B on February 5, 2026*

Went through the pack in a week. Very high quality and the specs on the front are exact especially for 3d prints. Great value and they fit great and are very strong. I used them for an outdoors application and they are showing no wear or movement.

## Frequently Bought Together

- ruthex M3 Threaded Inserts - 100 Pieces RX-M3x5.7 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,2240 Pcs M3 Screws Nuts Washers Assortment M3x4MM-35MM, Hex Socket Button & Cap Head M3 Machine Bolts Kit, 12.9 & 10.9 Grade Alloy Steel,Black Screws for 3D Printing

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.no/products/494677929-ruthex-m3-threaded-inserts-100-pieces-rx-m3x5-7-brass](https://www.desertcart.no/products/494677929-ruthex-m3-threaded-inserts-100-pieces-rx-m3x5-7-brass)

---

*Product available on Desertcart Norway*
*Store origin: NO*
*Last updated: 2026-10-04*