Joyangy 120pcs M3 Brass Knurled Insert Nuts - 4x5mm Threaded Inserts For 3D Printing & Plastics

3D printing enthusiasts, this one's for you. This pack includes 120 brass knurled insert nuts, sized M3 x 4 x 5mm. They're designed to be heat-set or ultrasonically installed into plastic parts, creating strong, reusable threaded holes. The knurled exterior grips the plastic securely, so they won't spin out. Perfect for adding screw threads to 3D prints, models, or DIY projects. Made from corrosion-resistant brass, they handle heat well and last a long time. Installation is straightforward with a soldering iron or heat insert tool. A must-have for anyone building custom parts, drones, or prototypes. Joyangy offers a 90-day guarantee, and their support is responsive. Upgrade your prints with these reliable inserts!