Product Details

Reliable Threaded Brass Heat Inserts for 3D Printed and Plastic Parts

Threaded Brass Heat Inserts, also called heat set brass inserts, are used to create strong reusable metal threads inside compatible plastic parts. They are a practical fastening solution for 3D printed components, plastic repair work, brackets, fixtures, electronics enclosures, printer parts, jigs, covers, and custom mechanical assemblies.

Instead of threading screws directly into plastic, brass heat inserts allow the part to accept machine screws more reliably. This gives your project a cleaner, more professional fastening point and makes repeated assembly, disassembly, servicing, and maintenance easier. They are especially useful where plastic threads may strip, wear out, or need reinforcement.

Sizes Available

Strong Reusable Threads in Plastic

Heat set inserts are useful when you need stronger threads than the plastic alone can provide. Once installed correctly, the brass insert becomes a threaded metal anchor inside the plastic part. This helps reduce thread stripping, improves screw retention, and provides a more durable fastening point for parts that may need to be opened or adjusted over time.

Useful for 3D Printing, Repairs, and Custom Builds

These inserts are well suited for 3D printed parts, printer upgrades, electronics cases, access panels, mounts, brackets, clamps, jigs, fixtures, robot parts, workshop tools, and plastic repair jobs. They can be used in new printed designs or as a repair option where threaded holes in plastic have been stripped or damaged.

Optional Use on Voron Stealthburner and Rat Rig Eva 3

Your current dnb3D product page notes that M3*5mm brass inserts are optionally used on the Voron Stealthburner and Rat Rig Eva 3. Always confirm the exact insert size required by your printed parts, assembly guide, and printer revision before ordering.

Installation Requires Controlled Heat

Threaded brass heat inserts are typically installed using a soldering iron or heat insert press with the correct tip. The insert is heated and pressed into a properly sized plastic hole so the surrounding plastic softens and forms around the knurled body. Proper temperature, alignment, hole size, and insertion depth are important for a clean, strong result.

Choose the Correct Insert Size

Select the insert based on screw size, insert height, outside width, plastic wall thickness, printed hole size, and available part depth. A hole that is too small can deform the part, while a hole that is too large may not grip the insert properly. For best results, test your hole size on a sample print before installing inserts into a finished part.

Pair with Related Fasteners and Printer Hardware

For related parts, browse the Fasteners category or the Brass Inserts category. These inserts pair well with metric socket head screws, button head screws, flat head screws, washers, spacers, brackets, printed parts, and 3D printer hardware from dnb3D.

Technical Reference

For printer build reference and assembly context, review the Voron 2.4 GitHub documentation or the Rat Rig V-Core 3 GitHub documentation for your specific printed part and toolhead configuration.

Every order is hand-inspected and precision-shipped from dnb3D in Marathon, Ontario. Whether you are building a 3D printer, repairing a stripped plastic hole, assembling an enclosure, or improving a printed part design, these Threaded Brass Heat Inserts provide a clean fastening solution for stronger reusable threads in plastic components.

Threaded Brass Heat Inserts

Threaded Brass Heat Inserts or Heat Set Brass Inserts are a great practical solution of joining or fastening components together. Makes a professional and attractive appearance to your projects that is convenient and easy to use.