M3x5x4 Brass Heat Set Insert - 100 pack

M3 Brass Heat Set Insert — M3x4x5

Upgrade your 3D printed parts with professional-grade brass heat set inserts. These M3 inserts are designed to be pressed into thermoplastic using a soldering iron, creating strong, reusable threaded connections that won't strip or pull out.

Why You'll Love Them

• Creates durable, metal-threaded holes in PLA, PETG, ABS, and other common 3D printing materials
• Knurled outer surface locks firmly into the plastic for maximum pull-out resistance
• Reusable threads stand up to repeated assembly and disassembly
• Compact M3x4x5 profile fits tight spaces without sacrificing strength
• Sold individually — order exactly what you need, no waste

Whether you're building enclosures, robotics, RC components, or functional prototypes, these brass inserts give your prints a clean, professional finish. Simply heat and press — no tapping required.