Package Contents: This comprehensive package includes 450 pieces of high quality metric thread inserts for heat setting plastics. Extra large quantity to meet all your needs for joining numerous plastic parts. Each knurled brass insert is available in sizes M2, M3, M4 ensuring a perfect fit to your specific requirements. PREMIUM MATERIALS: These threaded inserts are made of top-grade copper material for superior durability and are highly resistant to breakage or deformation. With high temperature resistance of over 300°C/572°F, they can easily withstand the harsh heat generated during the heat setting process of plastics. EASY TO INSTALL: Enjoy a hassle-free installation process with our knurled brass threaded inserts. These inserts can be easily heated and integrated seamlessly into the tapered holes of the plastic part. The fully knurled pattern of these 3D printed brass inserts ensures a perfect match with your plastic parts, ensuring stable and efficient performance in plastic heat setting applications. PRECISE CRAFT: Our threaded inserts feature a clean surface and a diagonal thread knurl pattern that install seamlessly to your plastic parts without scratching or damaging them. The smaller diameter at the front of the insert allows for precise insertion into the 3D printed hole. In addition, the angled thread knurling significantly enhances torque resistance, holding the insert securely to the plastic component for extended service life. Wide range of applications: These versatile metric thread inserts are compatible with a variety of plastics, including PC, PA, PLA, ABS, PETG and more. Whether you install them on a 3D printer, electric molding machine, electric molding machine, automotive plastic housing or laptop mold, these inserts will provide a reliable and long-lasting solution. Colour:Gold Material:copper Package Contents: 450 * nut Only the above package content, other products are