
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 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
- 50Ă— Brass Heat-Set Inserts (M3 Ă— 4 mm)
Original: $12.88
-70%$12.88
$3.86Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
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
- 50Ă— Brass Heat-Set Inserts (M3 Ă— 4 mm)





















