220 PCS Brass Heat Insert Nuts M2–M6 Knurled Embedment Kit
220 PCS Brass Heat Insert Nuts M2–M6 Knurled Embedment Kit
220-Piece Brass Heat Insert Nut Assortment – M2 to M6
Get a complete, ready-to-use collection of brass heat-set insert nuts covering six common metric sizes — M2, M2.5, M3, M4, M5, and M6. Whether you're working on 3D-printed parts, woodworking projects, or plastic enclosures, these knurled, double-twill embedment nuts deliver rock-solid threaded inserts that won't strip or spin out.
Why Choose These Heat Insert Nuts?
- Solid Copper (Brass) Construction: Corrosion-resistant and highly durable — built to last through countless assembly and disassembly cycles.
- Knurled Double-Twill Design: The diamond-knurled exterior bites deep into thermoplastics and soft materials for a permanent, wobble-free grip once heat-set.
- 6 Sizes in One Kit: M2, M2.5, M3, M4, M5, and M6 — the most frequently used metric sizes for hobbyist and professional projects alike.
- 220 Pieces Total: Generous quantity ensures you always have the right size on hand, minimising project downtime.
- Organised Storage Box Included: A dedicated compartment box keeps every size sorted and accessible, so you spend less time searching and more time building.
- Versatile Application: Ideal for FDM/FFF 3D printing, RC vehicles, electronics enclosures, plastic injection moulded parts, woodworking, and general DIY assemblies.
How to Use Heat Insert Nuts
- Design or drill a hole in your workpiece slightly smaller than the insert's outer diameter.
- Place the insert nut on the tip of a soldering iron or dedicated heat-set tool.
- Gently press the heated nut flush into the material — the knurled exterior melts in and locks on cooling.
- Allow to cool fully before threading your bolt or screw for a strong, reusable connection.
Kit Contents
| Size | Thread Pitch | Typical Use |
|---|---|---|
| M2 | 0.4 mm | Small electronics, PCB standoffs |
| M2.5 | 0.45 mm | Compact enclosures, RC parts |
| M3 | 0.5 mm | 3D printed assemblies, servos |
| M4 | 0.7 mm | Structural plastic panels |
| M5 | 0.8 mm | Medium load-bearing joints |
| M6 | 1.0 mm | Heavy-duty plastic enclosures |
Specifications
- Material: Copper (Brass)
- Thread Type: Metric (M2 / M2.5 / M3 / M4 / M5 / M6)
- Design: Knurled Double-Twill Embedment
- Quantity: 220 pieces
- Storage: Compartment box included
- Made in Mainland China
Related Tools & Accessories
Pair these heat insert nuts with other workshop essentials from our store:
- Air Compressor Pressure Gauge 0-10/0-12/0-25 Bar | DIY Tool
- 18 Pc Basswood Carving Blocks – Whittling Wood Kit for Carvers
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Frequently Asked Questions
Q: What tool do I need to install these brass heat insert nuts?
A: You can use a standard soldering iron or a dedicated heat-set insert tool. Set the tool to around 200–250 °C (depending on your material), place the insert on the tip, and press it gently and evenly into the pre-drilled hole until it sits flush.
Q: Are these heat insert nuts compatible with standard metric screws and bolts?
A: Yes — all six sizes (M2, M2.5, M3, M4, M5, M6) follow standard metric thread specifications, so they accept any corresponding standard metric bolt or machine screw.
Q: What materials can I use these knurled embedment nuts with?
A: They are designed primarily for thermoplastics such as PLA, PETG, ABS, and nylon (common 3D printing filaments), as well as injection-moulded plastics and soft wood composites. They are not intended for use in metals or hard ceramics.
Q: How many nuts of each size are included in the 220-piece set?
A: The set is distributed across M2, M2.5, M3, M4, M5, and M6 sizes. Each size comes in multiples sufficient for a wide range of projects; the exact per-size count is listed on the compartment box label included with your order.