Brass Heat Insert M3 × 3mm – Heat-Set Threaded Insert for 3D Printing & Plastic Parts

Build stronger and more professional 3D-printed parts with M3 × 3mm Brass Heat-Set Inserts. These precision brass threaded inserts are designed to be installed into thermoplastic materials using heat, creating a durable internal thread for repeated screw installation and removal.

They are especially useful for 3D printed enclosures, electronics projects, robotics, RC projects, CNC components, mechanical assemblies, and DIY prototypes where ordinary self-tapping screws may not provide sufficient strength or durability.

The knurled exterior of the brass insert helps it grip the surrounding plastic after installation, providing a secure mechanical connection.

Key Features

• Thread Size: M3
• Insert Length: 3mm
• Material: Brass
• Type: Heat-Set / Heat Insert
• Installation: Soldering iron or heat-insertion tool
• Strong Internal M3 Thread
• Knurled exterior for improved grip
• Ideal for 3D-printed parts
• Suitable for repeated screw installation and removal
• Excellent for electronics enclosures and mechanical assemblies
• Compact design for space-limited applications

Applications

These M3 brass heat inserts can be used for:

• 3D printer projects
• 3D-printed enclosures
• Arduino and ESP32 projects
• Raspberry Pi projects
• PCB mounting
• Electronics housings
• Robotics projects
• RC models
• CNC projects
• DIY mechanical parts
• Prototypes
• Custom brackets and mounts
• Plastic assemblies
• Product development

How to Install

1. Create an appropriately sized hole in your thermoplastic or 3D-printed part.
2. Place the M3 brass heat insert over the hole.
3. Heat the insert using a soldering iron or heat-insertion tool.
4. Gently press the insert into the plastic.
5. Allow the plastic to cool and solidify around the insert.
6. Install your M3 screw.

Tip: The required hole diameter can vary depending on the 3D-printing material, printer settings, insert design, and application. Test on a small sample before installing inserts into the final part.

Why Use Brass Heat Inserts?

Compared with directly threading plastic, a brass heat insert provides a more durable threaded connection and is better suited to applications where the screw needs to be removed and installed repeatedly.

They are an excellent choice for 3D printing and electronics projects requiring secure M3 screw mounting.

Technical Specifications