Ruthex 270-piece brass heat-set threaded insert kit for 3D printed parts and thermoplastics. Includes #2-56, #4-40, #8-32, and #10-24 inserts in a practical assortment box for strong, reliable threaded connections. Key features: 270-piece brass heat-set threaded insert assortment Includes #2-56, #4-40, #8-32, and #10-24 internal thread sizes Quantity breakdown: 70 pcs RX-2-56x4, 100 pcs RX-4-40x5.7, 50 pcs RX-8-32x8.1, 50 pcs RX-10-24x9.5 Suitable for heat or ultrasonic installation Designed for 3D printed parts and thermoplastics Opposing spiral knurling helps provide strong hold Brass construction offers corrosion resistance and thermal conductivity Works with PLA, PETG, ABS, PPS, PP, and more Supplied in a practical assortment box Polished full description: The Ruthex 270-piece threaded insert assortment kit is designed for creating strong, durable threads in 3D printed parts and other thermoplastic components. This set includes four common UNC internal thread sizes: #2-56, #4-40, #8-32, and #10-24, making it suitable for a wide range of maker, repair, prototyping, and assembly applications. These brass heat-set inserts can be retrofitted into plastic parts using heat from a soldering iron or by ultrasonic installation. They are suitable for use in blind holes or through holes and are designed to install cleanly into 3D printed components from printers such as Anycubic, Creality, Prusa, and similar systems. The insert geometry is designed for firm holding power and easier installation. Opposing spiral-shaped knurling helps provide balanced tightening and loosening torque along with strong holding force once installed. The guide design helps simplify insertion for more convenient and controlled placement. Made from brass, these threaded inserts offer excellent thermal conductivity, corrosion resistance, and long service life. Once the surrounding plastic cools and hardens, the insert becomes firmly anchored in place. These inserts are designed for use with a wide variety of thermoplastics including PLA, PETG, ABS, PPS, and PP. The assortment includes 70 pieces of RX-2-56x4, 100 pieces of RX-4-40x5.7, 50 pieces of RX-8-32x8.1, and 50 pieces of RX-10-24x9.5. The set comes packed in a practical assortment box for easy storage and organization. Item specifics suggestion: Brand: Ruthex Type: Heat Set Threaded Insert Kit Number of Pieces: 270 Material: Brass Thread Sizes: #2-56, #4-40, #8-32, #10-24 Thread Standard: UNC Installation Type: Heat Set, Ultrasonic Features: Knurled, Corrosion Resistant, Assortment Box Application: 3D Printing, Plastic Parts, Thermoplastics, Prototyping Suitable For: PLA, PETG, ABS, PPS, PP