QSJ 350Pcs M3 Threaded Inserts Heat Set Inserts Kit, Brass Inserts with 1 M3 Soldering Iron Tip for Plastic Parts and 3D Printing (M3x5.7x4.6)

Complete Packaging Comes with 350 M3 x L5.7 x D4.6 brass threaded inserts and 1 M3 Soldering Iron Tip Included. Everything you need in one compact set. | Durable Brass Construction Made from high-quality brass for excellent durability, corrosion resistance, and long-lasting performance. | Effortless Installation Place the insert into the hole in your 3D print, then gently press the heated soldering iron tip onto the threaded end of the insert. The heat melts the plastic slightly, letting the insert settle in securely. Let it cool, then it is ready to use. | M3 Sizing Guide M3 x L5.7 x D4.6 inserts measure 4.6mm outer diameter x 5.7mm length with a standard M3 thread. The longer L5.7 body grips more material in thin-walled or low-strength plastic. Use a pilot hole slightly smaller than the insert for a snug heat-set fit. | Perfect for Plastic Parts and 3D Printing Great for reinforcing joints in 3D printed enclosures, models, and accessories widely used for plastic parts, prototyping, and hobby builds.