400Pcs Brass Threaded Inserts Kit (M2–M6) – Heat Set Inserts for Plastic This assortment of metric threaded inserts is designed for secure fastening in plastic and 3D-printed components. With a wide size range and durable brass construction, this kit supports both hobby and professional applications. Key Features Complete 400-Piece Assortment Includes M2, M2.5, M3, M4, M5, and M6 sizes, providing flexibility for a wide range of fastening needs in 3D printing and plastic components. High-Quality Brass Construction Manufactured from durable brass with excellent thermal conductivity and corrosion resistance. Designed to withstand high temperatures during heat-set installation. Precision Threading and Knurled Design Clean, accurate threads ensure smooth installation and reliable fastening. The 45-degree knurled exterior improves grip, torque resistance, and pull-out strength. Efficient Installation Can be installed using a soldering iron, heat-set tool, ultrasonic methods, or during injection molding. Designed for consistent and repeatable results. No Countersinking Required Built-in guiding features allow for straightforward installation without additional preparation. Wide Compatibility Suitable for use with PLA, PETG, ABS, PPS, PP, and other thermoplastics. Ideal for 3D printing, electronics housings, automotive plastic parts, and general repairs. Specifications Sizes: M2, M2.5, M3, M4, M5, M6 Material: Brass Quantity: 400 pieces Installation: Heat set, ultrasonic, or molding Package Includes 400 × Brass threaded inserts (assorted sizes M2–M6) Storage case for organization