--- product_id: 495606935 title: "ruthex Threaded Inserts M2 + M3 + M4 + M5 Assortment Box - 70 + 100 + 50 + 50 Pieces - Brass Heat Set Insert for Plastic Parts - Metric knurled Nuts - Insert by Heat into 3D Printing Components" brand: "ruthex" price: "£33.66" currency: GBP in_stock: true reviews_count: 13 category: "Ruthex" url: https://www.desertcart.co.uk/products/495606935-ruthex-threaded-inserts-m2-m3-m4-m5-assortment-box-70 store_origin: GB region: United Kingdom --- # Heat & ultrasonic embed tech 270 pcs assorted M2-M5 inserts Brass, corrosion & wear resistant ruthex Threaded Inserts M2 + M3 + M4 + M5 Assortment Box - 70 + 100 + 50 + 50 Pieces - Brass Heat Set Insert for Plastic Parts - Metric knurled Nuts - Insert by Heat into 3D Printing Components **Brand:** ruthex **Price:** £33.66 **Availability:** ✅ In Stock ## Summary > 🔧 Upgrade your 3D prints with brass precision—because your projects deserve the best! ## Quick Answers - **What is this?** ruthex Threaded Inserts M2 + M3 + M4 + M5 Assortment Box - 70 + 100 + 50 + 50 Pieces - Brass Heat Set Insert for Plastic Parts - Metric knurled Nuts - Insert by Heat into 3D Printing Components by ruthex - **How much does it cost?** £33.66 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/495606935-ruthex-threaded-inserts-m2-m3-m4-m5-assortment-box-70) ## 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 - • **Compact Organizer Box:** Keep your workspace sleek with a tidy, lead-free assortment box ready for immediate use. - • **All-in-One Precision Kit:** 270 premium brass inserts covering M2 to M5 threads for every 3D print fix. - • **Unmatched Grip & Durability:** Knurled spiral design ensures rock-solid hold and smooth screw threading every time. - • **Universal Plastic Compatibility:** Engineered for PLA, PETG, ABS, and more—perfect for all your thermoplastic projects. - • **Effortless Heat & Ultrasound Installation:** Embed inserts seamlessly with soldering iron or ultrasonic tools—no mess, no stress. ## Overview The ruthex Threaded Inserts Assortment Box offers 270 high-quality brass heat-set inserts in M2, M3, M4, and M5 sizes. Designed for easy embedding into thermoplastic 3D printed parts using heat or ultrasound, these knurled inserts provide superior corrosion resistance, strong holding power, and smooth screw engagement. Ideal for professional makers and engineers seeking durable, reusable threaded solutions in a convenient organizer box. ## 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 - M2 + M3 + M4 + M5 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, Creality or Prusa. With the help of heat from a soldering iron or ultrasound, 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 holds firmly 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 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 BOX: The ruthex threaded inserts box are lead free and consists of 70 pieces RX-M2x4 + 100 pieces RX-M3x5.7 + 50 pieces RX-M4x8.1 + 50 pieces RX-M5x9.5 Insert nuts with M2, M3, M4 and M5 internal thread. The thread inserts are supplied in a practical assortment box. The threaded sleeves can be used by ultrasonic and be inserted by ultrasonic and heat embedding ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B08K1BVGN9 | | Best Sellers Rank | #1,073 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #1 in Nut Inserts | | Brand | ruthex | | Color | Metric Threaded Insert | | Compatible Groove Diameter | 4.2 Millimeters | | Customer Reviews | 4.8 out of 5 stars 4,203 Reviews | | Drive Style | Spline | | Exterior Finish | Brass | | Fastener Type | Insert | | Finish Types | Brass | | Grade Rating | Commercial | | Inside Thread Size | M2 | | Item Diameter | 3 Millimeters | | Item Dimensions | 5.12 x 2.76 x 0.83 inches | | Manufacturer | ruthex | | Material | Brass | | Material Type | Brass | | Maximum Shear Strength | 275 MPa | | Metal Type | Brass | | Model | GE-KASTEN-001 | | Number Of Items | 1 | | Number of Pieces | 270 | | Part Number | GE-P-D | | Screw Head Style | Tapered | | Size Name | Box M2/M3/M4/M5 (270pcs) | | Thread Class | Thick | | Thread Coverage | Fully Threaded | | Thread Size | M2, M3, M4, M5 | | Thread Style | Right Hand | | Thread Type | Metric | ## Product Details - **Material:** Brass - **Fastener Type:** Insert - **Thread Size:** M2, M3, M4, M5 - **Exterior Finish:** Brass - **Color:** Metric Threaded Insert ## Images ![ruthex Threaded Inserts M2 + M3 + M4 + M5 Assortment Box - 70 + 100 + 50 + 50 Pieces - Brass Heat Set Insert for Plastic Parts - Metric knurled Nuts - Insert by Heat into 3D Printing Components - Image 1](https://m.media-amazon.com/images/I/81pmPAQxELL.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 .. --- ## 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.co.uk/products/495606935-ruthex-threaded-inserts-m2-m3-m4-m5-assortment-box-70](https://www.desertcart.co.uk/products/495606935-ruthex-threaded-inserts-m2-m3-m4-m5-assortment-box-70) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-06-23*