520Pcs Brass Threaded Inserts Kit M2 M3 M4 M5 Hot Melt Heat Set Knurled Nuts for 3D Printer Parts & Plastic Fasteners

520PCS M2-M5 Brass Heat Set Inserts, Double Twill Knurled Threaded Nuts for 3D Printer Parts & Plastic Fastening

✨ Complete Specifications & Sufficient Quantity, All-in-One Kit

This kit includes 520 pieces covering all M2/M3/M4/M5 sizes, meeting the needs of most

3D printed and injection molded parts.
Multiple lengths available (2mm~12mm), suitable for embedding installation on both thin and thick plastic parts.

High-Stability Anti-Loose Design, No Slipping

Opposite double spiral knurling provides strong bite force after hot melt or ultrasonic installation, preventing loosening and falling out.

Precision internal threads resist stripping even after repeated disassembly and assembly, ensuring durable connections.

Premium Brass Material, Superior Quality

Made of high-quality brass with a burr-free, corrosion-resistant, high-temperature-resistant surface, compatible with most thermoplastics such as ABS, PLA, and PC.

High dimensional accuracy with tight tolerances for smooth, jitter-free installation

Super Easy to Install, Beginner-Friendly

Supports both hot melt and ultrasonic installation methods; quick installation with a soldering iron or heat-set tool.

Comes with a storage case and specification chart for organized storage and easy access.

Multi-Scenario Compatibility, High Practicality

Designed specifically for reinforcing threads in 3D printed parts, plastic enclosures, model making, and injection molded parts.

Also ideal for DIY projects, crafts, electronic enclosures, and plastic part thread reinforcement.