M3x4x5 Brass Insert (10pcs)

M3x4x5 Brass Insert (10pcs)

The M3 x 4×5 Brass Threaded Insert is a specialized fastener designed for post-mold installation into thermoplastics. Unlike tapping threads directly into plastic—which can wear out after just a few uses—these heat-set inserts provide a permanent, high-strength metal thread. They are the gold standard for 3D printed parts (PLA, PETG, ABS) and notch-sensitive thermoplastics, ensuring your assemblies can be taken apart and reassembled hundreds of times without losing grip.

Key Features

Each insert is engineered with a dual-action exterior: a series of knurls and ridges designed to maximize surface area. When installed using a soldering iron or heat-insertion tool, the surrounding plastic flows into these ridges and solidifies, creating an incredibly strong bond. This results in very high pull-out and torque resistance, preventing the insert from spinning or ripping out under heavy mechanical loads.

Why Use Heat-Set Inserts?

In traditional manufacturing, bolts are often tapped into metal. In 3D printing and plastic molding, threads are a point of failure. These inserts solve that by:

• Durability: Providing a robust M3 internal thread that won’t strip.

• Precision: Ensuring perfect alignment for bolts and machine screws.

• Easy Installation: Can be easily pressed into a pre-designed hole using a standard soldering iron.

• High Torque: The knurled exterior “bites” into the plastic once cooled, handling high-tension applications with ease.

Versatile Applications

• 3D Printing & Prototyping: Essential for Voron builds, drone frames, and custom electronic enclosures.

• Consumer Electronics: Securing internal PCBs and components into plastic housings.

• Robotics: Mounting servos and sensors to plastic structural brackets.

• Automotive: Used in custom interior modifications and sensor mounts.