Looking for the best metal inserts for your 3D printed parts? We’ve got you covered with a list of top options to enhance the strength and durability of your creations.
3D printing is a fun and creative way to make things. But sometimes, your prints need a little extra strength. That’s where metal inserts come in.
They add strong threads to your plastic parts. This makes them last longer and work better. You’ll love how easy they are to use.
With the right inserts, your projects will feel professional and reliable. Let’s explore the best options for your 3D prints.
List of Top 10 Metal Inserts For 3D Printed Parts
| Image | Title | Best For | Price |
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Ktehloy 400Pcs Metric Heat Set Insert, M2 M2.5 M3 M4 M5 M6 Female Thread Knurled Nuts Assortment Kit, Brass Threaded Inserts for Plastic and 3D Printing Components (Threaded Inserts Ket) |
This product is perfect for 3D printing fans, makers, and anyone who works with plastic parts and wants strong, clean threads. It’s great for people who want simple, solid, and long‑lasting connections in their builds. |
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Preciva M3 Threaded Inserts Set, 360Pcs Heat Set Bolts Nuts with M3 Insert Tip and 60W Digital Soldering Iron, for 3D Printer Parts or Plastic Parts |
This Preciva M3 Threaded Inserts Set is perfect for 3D printing enthusiasts and anyone working with plastic parts. It’s ideal for easy repairs and strong connections without damaging your projects. |
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HANGLIFE Heat-Set Threaded Inserts, M3 Heat Set Insert for 3D Printing Components and Plastic Parts – Brass Metric Knurled Nuts (100 Pieces) |
HANGLIFE Heat-Set Threaded Inserts are perfect for 3D printing enthusiasts and makers who want to strengthen their creations. These brass inserts are easy to use and work great with all kinds of plastics. |
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440Pcs Threaded Inserts Bolt Set M2.5 M3 Heat Set Insert Brass Nut with Bolt for 3D Printed Plastic Parts |
This set is perfect for makers who want strong, clean, and easy joins in 3D‑printed parts. It suits anyone who needs simple, solid, and long‑lasting fasteners for plastic builds. |
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Kadrick 520Pcs M2 M3 M4 M5 Threaded Inserts Assortment Kit for 3D Printing Components, Metric Brass Knurled Nuts, Insert by Heat into Plastic Parts |
This kit is perfect for makers who use 3D printers. It helps you fix parts with strong metal threads. |
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600+7Pcs Brass Threaded Inserts Kit M2 M2.5 M3 M4 M5 M6 – Heat Set Insert Tool Included, Metric Knurled Nuts for 3D Printed Parts PLA/PETG/ABS – Strong Metal Threads for Hobbyists & Repair |
This kit is perfect for 3D print makers, DIY fixers, and tool users who want strong metal threads in PLA, PETG, or ABS. It is also great for repair work and small build jobs that need clean, long-lasting screw holes. |
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3DZWMAN Heat Set Insert Tools kit Brass Nuts 3D Printing 60W Digital Soldering Iron and 380 Pcs Kit Threaded Inserts with Insert Tips M2 M2.5 M3 M4 M5 M6(1/4) M8 for Inserts 3D Printing and Plastic |
This kit is great for 3D print fans and anyone who works with plastic parts. It helps people who want strong, clean, and easy threaded inserts in their builds. |
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FFVRVSS 300+6Pcs M2 M2.5 M3 M4 M5 Premium Brass Threaded Inserts, Metric Brass Knurled Nuts Assortment Kit, with Heat Set Insert Tool, for Plastic and 3D Printing Components, All-in-one Solutions |
This set is great for 3D printing fans, DIY makers, and anyone who wants strong, clean threads in plastic parts. It also fits people who want an easy, organized, and ready-to-use kit. |
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100 PCS M3 Threaded Insert M3 x 4mm x 5mm Heat Set Inserts, 3D Printing Brass Nuts Threaded Inserts Nuts for Plastic, Female Thread Knurled Heat Embedment Nut for Loptop Automotive Plastic Shell |
These M3 threaded inserts are perfect for DIYers and professionals working with 3D printing and plastic parts. They’re great for automotive, electronics, and laptop projects. |
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3DZWMAN 100PCS M2.5 Threaded Inserts with M2-M8 Heat Set Insert Tips |
This product is perfect for 3D printing enthusiasts and makers who need strong, reusable threads in their projects. It’s ideal for anyone using Bambu Lab, Anycubic, ELEGOO, Creality, FLASHFORGE, or Prusa printers. |
Detailed Reviews
Discover the top 10 metal inserts for 3D printed parts, carefully selected for quality, durability, and ease of use. Each product is reviewed to help you find the perfect fit for your projects. Whether you’re a hobbyist or professional, this guide ensures strong, reliable connections every time. Start here to make your 3D prints stronger and more durable.
1. Ktehloy 400Pcs Metric Heat Set Insert, M2 M2.5 M3 M4 M5 M6 Female Thread Knurled Nuts Assortment Kit, Brass Threaded Inserts for Plastic and 3D Printing Components (Threaded Inserts Ket)

Ktehloy 400Pcs Metric Heat Set Inserts are high-quality brass nuts designed for 3D printing and plastic components. They come in six sizes (M2 to M6) to fit various projects.
These inserts are easy to install, heat-resistant, and durable. They work with all thermoplastics and ensure strong, reliable connections.
| Pros | Cons |
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Perfect For:
This product is perfect for 3D printing fans, makers, and anyone who works with plastic parts and wants strong, clean threads. It’s great for people who want simple, solid, and long‑lasting connections in their builds.
Ready to Purchase?
2. Preciva M3 Threaded Inserts Set, 360Pcs Heat Set Bolts Nuts with M3 Insert Tip and 60W Digital Soldering Iron, for 3D Printer Parts or Plastic Parts

The Preciva M3 Threaded Inserts Set is a complete kit for 3D printing and plastic parts. It includes 130 threaded inserts, 130 bolts, 100 nuts, and essential tools. The set also comes with a 60W digital soldering iron for precise work.
The heat-set insert tips make installation easy and clean. They embed threaded inserts into plastic without damage. The soldering iron adjusts from 200°C to 500°C for versatility.
This kit protects your 3D printed parts during assembly. It’s simple to use and reliable. Customer support is available for any questions.
| Pros | Cons |
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Perfect For:
This Preciva M3 Threaded Inserts Set is perfect for 3D printing enthusiasts and anyone working with plastic parts. It’s ideal for easy repairs and strong connections without damaging your projects.
Ready to Purchase?
3. HANGLIFE Heat-Set Threaded Inserts, M3 Heat Set Insert for 3D Printing Components and Plastic Parts – Brass Metric Knurled Nuts (100 Pieces)

These brass inserts make your 3D prints much stronger. You can easily install them with heat or sound.
The knurled nuts give a tight hold and stop twisting. They resist rust and last a long time. You can put them into many plastics.
This set works with PLA, PETG, ABS, and more. Each M3 insert is 5mm wide and 4mm long. You get 100 pieces in one pack.
| Pros | Cons |
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Perfect For:
HANGLIFE Heat-Set Threaded Inserts are perfect for 3D printing enthusiasts and makers who want to strengthen their creations. These brass inserts are easy to use and work great with all kinds of plastics.
Ready to Purchase?
4. 440Pcs Threaded Inserts Bolt Set M2.5 M3 Heat Set Insert Brass Nut with Bolt for 3D Printed Plastic Parts

This 440-piece set has brass inserts and stainless steel bolts. It works great for 3D printed plastic parts.
The brass resists rust. The steel is very strong. They join to make solid holds.
You get many fasteners for big jobs. Your 3D prints stay tight and safe.
| Pros | Cons |
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Perfect For:
This set is perfect for makers who want strong, clean, and easy joins in 3D‑printed parts. It suits anyone who needs simple, solid, and long‑lasting fasteners for plastic builds.
Ready to Purchase?
5. Kadrick 520Pcs M2 M3 M4 M5 Threaded Inserts Assortment Kit for 3D Printing Components, Metric Brass Knurled Nuts, Insert by Heat into Plastic Parts

Kadrick 520Pcs is a brass insert kit for 3D printing. It helps you add strong threads to plastic parts.
It has M2, M3, M4, and M5 sizes. The parts fit in a clear box. Each size is easy to find.
The inserts are made of high-quality brass. They give a firm grip and resist rust. Kadrick also offers a 24-month warranty.
| Pros | Cons |
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Perfect For:
This kit is perfect for makers who use 3D printers. It helps you fix parts with strong metal threads.
Ready to Purchase?
6. 600+7Pcs Brass Threaded Inserts Kit M2 M2.5 M3 M4 M5 M6 – Heat Set Insert Tool Included, Metric Knurled Nuts for 3D Printed Parts PLA/PETG/ABS – Strong Metal Threads for Hobbyists & Repair

This kit gives your 3D prints strong metal threads that last. The inserts hold tight in PLA, PETG, and ABS. Your parts stay solid even after many uses.
You get over 600 brass inserts in the most useful sizes. A heat‑set tip is included, so you can start right away. Each piece is made for clean, firm grip.
The setup is fast and simple. Your projects feel stronger and more reliable.
| Pros | Cons |
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Perfect For:
This kit is perfect for 3D print makers, DIY fixers, and tool users who want strong metal threads in PLA, PETG, or ABS. It is also great for repair work and small build jobs that need clean, long-lasting screw holes.
Ready to Purchase?
7. 3DZWMAN Heat Set Insert Tools kit Brass Nuts 3D Printing 60W Digital Soldering Iron and 380 Pcs Kit Threaded Inserts with Insert Tips M2 M2.5 M3 M4 M5 M6(1/4) M8 for Inserts 3D Printing and Plastic

The 3DZWMAN Heat Set Insert Tools Kit gives you fast, clean, and strong inserts for your 3D prints. The 60W digital iron heats up fast and is simple to control. Every part is made to help you work with ease.
You get clear heat control. You get quick tip changes. You get smooth, firm inserts.
The brass inserts grip well and hold tight. They work with many plastics like PLA, ABS, and PETG. This kit makes your prints stronger and your work easier.
| Pros | Cons |
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Perfect For:
This kit is great for 3D print fans and anyone who works with plastic parts. It helps people who want strong, clean, and easy threaded inserts in their builds.
Ready to Purchase?
8. FFVRVSS 300+6Pcs M2 M2.5 M3 M4 M5 Premium Brass Threaded Inserts, Metric Brass Knurled Nuts Assortment Kit, with Heat Set Insert Tool, for Plastic and 3D Printing Components, All-in-one Solutions

The FFVRVSS 300+6Pcs Kit is your all-in-one solution for 3D printing and plastic components. It includes 5 essential metric sizes: M2, M2.5, M3, M4, and M5. The upgraded heat set tool makes installation quick and easy.
Made from premium brass, these inserts resist corrosion and breakage. Their precision design ensures a secure grip every time. No more slipping or weak connections.
Stay organized with clearly labeled compartments. Works with all thermoplastics and various projects. Reliable quality for long-lasting results.
| Pros | Cons |
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Perfect For:
This set is great for 3D printing fans, DIY makers, and anyone who wants strong, clean threads in plastic parts. It also fits people who want an easy, organized, and ready-to-use kit.
Ready to Purchase?
9. 100 PCS M3 Threaded Insert M3 x 4mm x 5mm Heat Set Inserts, 3D Printing Brass Nuts Threaded Inserts Nuts for Plastic, Female Thread Knurled Heat Embedment Nut for Loptop Automotive Plastic Shell

Reinforce your 3D prints with this 100-piece M3 brass threaded insert kit. Perfect for plastic parts, these inserts add strength and durability. Ideal for DIYers and pros alike.
Easy to install, these inserts work with heat or ultrasonic waves. Their knurled design ensures a secure fit, even in high-stress applications.
| Pros | Cons |
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Perfect For:
These M3 threaded inserts are perfect for DIYers and professionals working with 3D printing and plastic parts. They’re great for automotive, electronics, and laptop projects.
Ready to Purchase?
10. 3DZWMAN 100PCS M2.5 Threaded Inserts with M2-M8 Heat Set Insert Tips

3DZWMAN 100PCS M2.5 Threaded Inserts are perfect for 3D printing projects. They create strong, reusable threads in your parts. These inserts work with many 3D printer brands.
The kit includes M2 to M8 heat-set inserts and a tool for easy installation. Use them with soldering irons like Hakko or T18. They fit PLA, ABS, PETG, and more materials.
Made from high-quality brass, these inserts resist corrosion and heat well. They are reusable and offer strong tensile strength. Contact us for satisfactory service if you have questions.
| Pros | Cons |
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Perfect For:
This product is perfect for 3D printing enthusiasts and makers who need strong, reusable threads in their projects. It’s ideal for anyone using Bambu Lab, Anycubic, ELEGOO, Creality, FLASHFORGE, or Prusa printers.
Ready to Purchase?
Buying Guide
Metal inserts make plastic parts strong. They help screws stay tight.
I used brass inserts on my last big project. The threads felt smooth and the fit was very firm.
Check the size. It must fit your hole. Pick the right length.
Look at the metal. Brass is a good choice. It heats up fast.
Think about the pattern. Knurled surfaces grip the plastic. This stops the part from spinning.
Check the heat. Some inserts need a soldering iron. Others press in cold.
Buy a kit. It gives you many sizes. This helps you save time.