M4 Heat Set Insert Kit for 3D Printing, Threaded Inserts Inserts Screw Kit

About this item

• Complete 255 Piece M4 Kit: Includes 85 M4 socket-head screws in nine lengths, 85 matching M4 hex nuts, and 85 brass heat-set inserts in three sizes, plus a 60W digital soldering iron, interchangeable insert tips, connecting rods, hex key, protective cap, and organized storage case for 3D printing, repairs, prototypes, and workshop projects
• COMPLETE 255-PIECE M4 KIT: Includes 85 M4 socket-head screws in nine lengths, 85 matching M4 hex nuts, and 85 brass heat-set inserts in three sizes, plus a 60W digital soldering iron, interchangeable insert tips, connecting rods, hex key, protective cap, and organized storage case for 3D printing, repairs, prototypes, and workshop projects
• Multiple M4 Sizes For Flexible Builds: Nine screw lengths from M4x4 to M4x35 support shallow, standard, and deeper fastening tasks, while M4x4x6, M4x6x6, and M4x8x6 brass inserts provide options for different wall thicknesses and part designs. Matching M4 nuts help complete assemblies for enclosures, brackets, fixtures, and custom components
• Brass Inserts For Reusable Threads: Knurled M4 heat-set inserts melt into compatible plastic parts to create reusable metal threads for repeated assembly and disassembly. Use them in 3D-printed parts, electronics housings, robotics, RC models, jigs, prototypes, and plastic repairs that need more reliable fastening than plastic threads alone
• Organized Storage And Simple Installation: Labeled compartments keep screws, nuts, brass inserts, and tools separated for faster size selection. Choose the correct insert and tip, prepare the pilot hole, heat and press the insert straight into compatible plastic, then let it cool fully before installing the matching M4 screw.