100Pcs M3 Heat Set Threaded Inserts, M3 Threaded Knurled Insert Nuts, Brass Heat Set Embedment Nut, Metric Knurled Nuts for 3D Printing Model Making DIY Fasteners Kit

• 【100-Piece M3 Threaded Insert Set】The set includes 100 M3 brass threaded inserts (M3x4x5mm), designed for reinforcing plastic and 3D printed parts. These heat-set inserts are ideal for DIY enthusiasts and professionals working with thermoplastic materials.
• 【Durable Brass Material】Made from high-quality brass, these threaded inserts for plastic offer corrosion resistance and long-term durability, providing reliable performance in demanding environments like automotive and electronics.
• 【Easy Installation】Designed for convenient use, these M3 heat-set inserts can be installed in both blind and through holes using heat or ultrasonic waves, making them compatible with various 3D printing materials and plastic components.
• 【Secure Fastening】The spiral knurled design of the M3 brass inserts ensures excellent grip and tightening torque, preventing loosening and maintaining secure connections in high-stress applications such as pressure components.
• 【Wide Compatibility】Perfect for a variety of thermoplastics like ABS, PLA, PETG, and more, these M3 inserts are ideal for 3D printers, electrical molding, automotive applications, and laptop plastic shells.

Product Overview Strengthen and reinforce your 3D prints, plastic parts, and DIY projects with this 100-piece set of M3 brass threaded inserts. Designed for heat-set installation, these knurled inserts provide durable, reusable threaded connections in thermoplastics, making them ideal for prototyping, repairs, electronics, automotive, and custom fabrication. Product Specifications Package Quantity: 100 threaded inserts Thread Size: M3 (metric) Dimensions: 4mm outer diameter x 5mm length (M3x4x5mm) Material: Brass (golden color) Design: Spiral knurled exterior, female internal thread Installation: Heat-set (soldering iron/heat press) or ultrasonic Key Features Complete 100-Piece Value Set: Get 100 identical M3 brass inserts—enough for multiple projects, prototyping batches, or workshop use. The bulk quantity ensures you always have spares on hand. Durable Corrosion-Resistant Brass: Made from quality brass that resists rust and oxidation, ensuring long-lasting thread integrity and reliable performance in electronics, automotive, outdoor, or high-humidity applications. Heat-Set for Secure Plastic Embedding: Designed to be melted into pre-drilled holes in thermoplastics (ABS, PLA, PETG, Nylon, etc.) using a soldering iron, heat press, or specialized insert tool, creating a permanent, strong threaded anchor. Knurled Exterior for Maximum Grip: The spiral knurling bites into the surrounding plastic during installation, preventing rotation or pull-out under torque and providing excellent resistance to vibration and loosening. Wide Compatibility with Plastics & 3D Prints: Suitable for use in 3D printed parts, injection-molded plastic housings, RC models, drone frames, laptop shells, automotive trim, electronic enclosures, and DIY repairs where strong threads are needed. Ideal For Adding screw threads to 3D printed parts Repairing stripped threads in plastic housings Reinforcing drone, robot, or RC model frames Securing electronic components in enclosures Custom automotive or motorcycle plastic parts Prototyping and small-batch manufacturing