Description Thread inserts kit - 170 pieces - M3 - M4

With this thread insert kit (170 pieces), you create strong threads in plastic. Ideal for 3D prints, housings, and parts that you frequently unscrew and screw back on. Instead of screwing directly into plastic, you insert a brass insert. Then you use a standard bolt. This is sturdier and prevents screw holes from stripping.

These are heat-set inserts. You place them in a pre-drilled hole and gently press them into place with a soldering iron. The plastic melts slightly and clamps tightly around the insert. This creates a neat, secure connection. Handy for electronics enclosures, robotics, prototypes, and repairs.

The set contains M3 and M4 inserts in multiple sizes. This makes it easy to choose what fits the wall thickness of your part. Everything comes in a well-organized storage box with compartments, so you can quickly grab the right size.

Contents

• 20x M3 x 6 x 5
• 20x M3 x 8 x 5
• 20x M4 x 4 x 6
• 20x M4 x 5 x 6
• 20x M4 x 6 x 6
• 20x M4 x 7 x 6
• 20x M4 x 8 x 6
• 10x M4 x 8.1 x 6.3
• 10x M4 x 8 x 6.5
• 10x M4 x 8 x 7