--- product_id: 504894953 title: "ruthex M4 Threaded Inserts - 50 Pieces RX-M4x8.1 Brass Heat Set Insert for Pl..." brand: "ruthex" price: "€ 16.65" currency: EUR in_stock: true category: "Ruthex" url: https://www.desertcart.pt/products/504894953-ruthex-m4-threaded-inserts-50-pieces-rx-m4x8-1-brass store_origin: PT region: Portugal --- # Heat-set installation for secure fit M4 metric precision threading Lead-free brass for durability ruthex M4 Threaded Inserts - 50 Pieces RX-M4x8.1 Brass Heat Set Insert for Pl... **Brand:** ruthex **Price:** € 16.65 **Availability:** βœ… In Stock ## Summary > πŸ”§ Upgrade your 3D prints with precision and durability – don’t get left behind! ## 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?** € 16.65 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/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 - β€’ **Bulk 50-Piece Set:** Stock up with 50 inserts, perfect for frequent makers and professionals aiming to streamline their assembly workflow. - β€’ **Precision M4 Threading:** Engineered for flawless compatibility with standard M4 screws, ensuring a perfect fit every time. - β€’ **Heat-Set & Ultrasonic Ready:** Easily embed inserts into 3D printed parts using heat or ultrasonic methods for a professional-grade hold. - β€’ **Superior Brass Construction:** Crafted from lead-free brass, offering excellent corrosion resistance and thermal conductivity for long-lasting performance. - β€’ **Universal Plastic Compatibility:** Designed to anchor firmly in PLA, PETG, ABS, and more, making it the go-to choice for diverse 3D printing materials. ## Overview The ruthex M4 Threaded Inserts are a premium set of 50 lead-free brass knurled nuts designed for heat or ultrasonic embedding into 3D printed plastic parts. Featuring M4 metric threading and a length of 8.1mm, these inserts provide a secure, corrosion-resistant, and reusable fastening solution compatible with a wide range of thermoplastics like PLA, PETG, and ABS. Ideal for professionals and enthusiasts seeking reliable, high-strength threaded connections in their 3D printing projects. ## Description 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: desertcart.com: Tools & Home Improvement ## 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 | #1,267 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 4.8 out of 5 stars (515) | | 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 | 6.6 centimeters | | Item Dimensions | 3.82 x 2.6 x 0.35 inches | | Manufacturer | ruthex | | 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 | | Outside Diameter | 4 millimeters | | Part Number | GE-M4x81-001 | | Screw Head Style | trapezoidal | | Set Name | ruthex M4 Brass Threaded Inserts (50pcs) | | 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 | 1.76 Ounce | ## Product Details - **Color:** Metric Threaded Insert - **Exterior Finish:** Brass - **Fastener Type:** Insert - **Material:** Brass - **Thread Size:** M4 x 8.1 ## 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/51d22HdoB0L.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/51ciEiLFBJL.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/51QFrH8fSHL.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/41Ru2xyUspL.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/51a9St9i2lL.jpg) ## Available Options This product comes in different **Color, Size** options. ## 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 --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.pt/products/504894953-ruthex-m4-threaded-inserts-50-pieces-rx-m4x8-1-brass](https://www.desertcart.pt/products/504894953-ruthex-m4-threaded-inserts-50-pieces-rx-m4x8-1-brass) --- *Product available on Desertcart Portugal* *Store origin: PT* *Last updated: 2026-08-30*