machining for reliable fastening: clear, accurate internal threads provide smooth screw engagement and prevent stripping or slipping under load. The 45‑degree angled knurling around the body dramatically increases torque resistance and pull‑out strength. , high‑quality brass construction: each threaded insert is made from premium brass for excellent thermal conductivity, resistance and long‑term stability. Designed to withstand temperatures above 300°C / 572°F, they remain reliable during intense plastic thermal forming and soldering work. Extensive package content: you receive 506 pcs high‑quality metric threaded inserts plus 7 pcs heat set insert tips, offering a complete solution for plastic heat‑setting projects. Assorted sizes M2, M2.5, M3, , M5 and M6 help match different 3D printing accessories. Simple to install with common tools: these brass threaded inserts can be embedded into 3D printed parts using a standard soldering iron, hot tool or ultrasonic equipment. They are also suitable for molding directly during plastic injection processes. Versatile applications in plastics and electronics: designed for most thermoplastics such as PLA, PETG, ABS, and PP, these inserts are perfect for 3D printed components, injection‑molded parts, automotive plastic covers and laptop shells., Weight: 0.661386786 Pounds, Manufacturer: Htuteyy