The M4 Brass Nut Insert is a precision-engineered, knurled heat-set threaded insert designed for creating strong, reusable screw threads in plastic or 3D printed parts. Crafted from high-quality brass, this insert provides excellent heat resistance, mechanical strength, and corrosion protection, making it perfect for demanding 3D printing, prototyping, and electronic enclosure applications.

The knurled outer surface ensures maximum grip within the plastic, preventing rotation or pull-out even under heavy loads. It can be easily embedded using heat (with a soldering iron) or ultrasonic insertion, resulting in a secure and permanent bond.

Features:

• Material: Premium-grade brass — durable, corrosion-resistant, and non-deformable

• Thread Size: M4

• Outer Diameter (OD): 6mm

• Length: 8mm

• Color: Classic brass tone

• High hardness and wear resistance for long-term durability

• Knurled body design provides superior mechanical locking in plastic

• Easy installation — no need for counter-sinking or flaring thanks to pilot guide

• Excellent heat and corrosion resistance; suitable for PLA, PETG, ABS, and nylon parts

• Can be installed using heat-set, ultrasonic embedding, or injection molding methods

• Creates reliable, reusable threads for 3D printed assemblies

• Ideal for parts that require frequent disassembly and reassembly

Specifications:

How to Install:

1. Drill or design a pilot hole slightly smaller than the insert’s OD (about 5.8mm for M4).

2. Heat the insert using a soldering iron tip (200–230°C depending on filament type).

3. Gently press the insert into the hole until it sits flush with the surface.

4. Allow it to cool and solidify — the brass will fuse with the plastic for a firm hold.

5. Your part is now ready for an M4 screw to be securely threaded.

Applications:

• 3D printed enclosures and prototypes

• Robotics and mechanical assemblies

• Electronics housings and devices

• Injection-molded plastic parts

• DIY projects and prototyping

• Fixtures, camera mounts, and mechanical joints

• Any plastic component requiring strong, reusable threads

Package Includes:

• 1 × M4 Brass Knurled Heat Insert Nut

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