M3/M4/M5 Heat-Set Threaded Inserts for 3D Printing

The M3/M4/M5 Heat-Set Threaded Inserts are specially designed for 3D printed parts, providing secure metal threads inside plastic components. Made from high-quality brass with a double-helical knurled design, these inserts ensure superior grip compared to standard injection-molded inserts.

They are easy to install using a soldering iron by pressing the insert into a pre-sized hole, allowing the plastic to flow into the ridges for a strong and permanent bond. This method offers a more durable, versatile, and professional solution than traditional captive nuts or other fastening methods.

These threaded inserts not only provide a reliable hold but also allow you to design multi-part assemblies that can be securely fastened with screws, making it easier to create larger builds beyond your printer’s volume. They also help reduce waste from failed prints and result in cleaner, more polished designs.

Sizes Available:

M3: 3mm (ID) × 4.5mm (OD) × 4mm (Height)

M4: 4mm (ID) × 6mm (OD) × 8mm (Height)

M5: 5mm (ID) × 7mm (OD) × 10mm (Height)