Adafruit
Brass Heat-Set Inserts for Plastic - M3 x 4mm - 50 pack
Brass heat-set inserts provide strong, reusable threaded connections in 3D-printed and injection-moulded plastic parts. Each insert has a knurled outer surfa...
Brass heat-set inserts provide strong, reusable threaded connections in 3D-printed and injection-moulded plastic parts. Each insert has a knurled outer surface that grips the surrounding plastic when pressed in with a heated soldering iron, and an M3 internal thread that accepts standard machine screws.
Using heat-set inserts instead of screwing directly into plastic gives a much stronger joint that can be assembled and disassembled repeatedly without stripping. They're an inexpensive way to add professional-quality fastening points to your enclosures, brackets, and housings.
Key Features
- M3 Internal Thread – Accepts standard M3 machine screws
- Knurled Outer Surface – Grips plastic securely when heat-pressed
- Brass Construction – Durable, corrosion-resistant, and reusable
- 4 mm Length – Suitable for typical 3D-printed wall thicknesses
- 50-Pack – Enough for multiple projects
Specifications
- Thread – M3
- Length – 4 mm
- Material – Brass
- Quantity – 50 pieces
Ideal For
- 3D-printed enclosures, brackets, and housings
- Injection-moulded plastic assemblies
- Any project requiring reusable threaded fastening in plastic
Package Contents
- 50× Brass Heat-Set Inserts (M3 × 4 mm)
Jargon buster
Plain-language definitions for the technical terms used above.
- Thread
- A low-power wireless mesh networking standard designed for smart home and IoT devices. It matters because Thread devices can relay messages through each other, helping build reliable networks for sensors and controllers.
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