--- product_id: 504894953 title: "ruthex M4 Threaded Inserts - 50 Pieces RX-M4x8.1 Brass Heat Set Insert for Pl..." brand: "ruthex" price: "75.69 DT" currency: TND in_stock: true reviews_count: 13 category: "Ruthex" url: https://www.desertcart.tn/products/504894953-ruthex-m4-threaded-inserts-50-pieces-rx-m4x8-1-brass store_origin: TN region: Tunisia --- # Heat-set embedding for seamless integration Lead-free brass for corrosion resistance & durability M4 precision threading with Class 9.6 tolerance ruthex M4 Threaded Inserts - 50 Pieces RX-M4x8.1 Brass Heat Set Insert for Pl... **Brand:** ruthex **Price:** 75.69 DT **Availability:** βœ… In Stock ## Summary > πŸ”© Upgrade your 3D prints with precision brass inserts that hold like a pro! ## 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?** 75.69 DT with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/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 Pack of 50 M4 Inserts:** Stay stocked and ready with 50 precision M4x8.1 inserts, designed for professional-grade assembly and repair. - β€’ **Unmatched Grip with Spiral Knurling:** Spiral-shaped knurled design ensures rock-solid hold and balanced torque for tightening and loosening. - β€’ **Premium Lead-Free Brass Construction:** Corrosion-resistant and thermally conductive brass guarantees longevity and reliable performance in all thermoplastics. - β€’ **Versatile Compatibility Across Plastics:** Perfectly anchors in PLA, PETG, ABS, PPS, PP, and moreβ€”ideal for all your 3D printing projects. - β€’ **Effortless Heat or Ultrasonic Installation:** Embed these inserts quickly with a soldering iron or ultrasonic toolβ€”no hassle, just perfect fit every time. ## Overview The ruthex M4 Threaded Inserts set includes 50 high-quality, lead-free brass inserts designed for heat or ultrasonic embedding into 3D printed parts. Featuring M4 internal threading with Class 9.6 tolerance and spiral knurling for superior grip, these inserts provide durable, corrosion-resistant fastening compatible with a wide range of thermoplastics. Ideal for professionals seeking reliable, reusable threaded solutions that enhance the strength and longevity of their 3D printed assemblies. ## 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 | #1,132 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 4,231 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 | | 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 | 1.7637 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 --- ## 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.tn/products/504894953-ruthex-m4-threaded-inserts-50-pieces-rx-m4x8-1-brass](https://www.desertcart.tn/products/504894953-ruthex-m4-threaded-inserts-50-pieces-rx-m4x8-1-brass) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-07-05*