Are you looking for the best brass inserts to strengthen your 3D prints? We offer a carefully tested selection of top-quality brass inserts that ensure strong, durable threads for your projects.
3D printing is a fun and creative way to bring your ideas to life. But to make your projects strong and durable, you need the right tools. Brass inserts are a game-changer for adding strong threads to your 3D prints.
These small parts make a big difference. They fit perfectly, hold tight, and last long. With the right brass inserts, your 3D prints will be ready for anything.
We’ve tested and reviewed the best brass inserts for you. Whether you’re a beginner or a pro, this guide will help you find the perfect match for your projects. Let’s get started!
List of Top 10 Brass Inserts For 3D Prints
| Image | Title | Best For | Price |
|---|---|---|---|
 |
FFVRVSS 600+7Pcs M2 M2.5 M3 M4 M5 M6 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 perfect for 3D printing fans, DIY makers, and anyone who needs strong metal inserts for plastic parts. It also suits engineers and hobby builders who want fast, clean, and secure results. |
|
 |
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 perfect for makers, 3D‑printing fans, and anyone who wants strong, clean threads in plastic parts with ease. It also suits beginners who want simple tools that work fast and give smooth, solid results. |
|
 |
FFVRVSS 320+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 |
This kit is perfect for makers and hobbyists. Use these brass inserts to build strong 3D prints. |
|
 |
HANGLIFE Heat-Set Threaded Inserts, M3 Heat Set Insert for 3D Printing Components and Plastic Parts – Brass Metric Knurled Nuts (100 Pieces) |
This brass nut is for people who use 3D prints. It makes your plastic parts strong. It is quick to use. It is easy to use. This threaded part fits many plastic tools. It is great for hobbyists. It is great for pro work. You get one hundred pieces. This helps you build sturdy projects. |
|
 |
Professional Heat Set Insert Tool Kit: 80W Soldering Iron Heat Insert Tool with 520pcs Brass Inserts & Heat Set Insert Tips (M2-M8) for 3D Printing |
This Professional Heat Set Insert Tool Kit is perfect for 3D printing enthusiasts and makers who want to create strong, functional prototypes. It’s ideal for anyone using PLA, ABS, or Nylon and needs reliable, corrosion-resistant threads. |
|
 |
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 is perfect for 3D printing fans, makers, and repair pros who need strong, neat threads in plastic. It is also great for electronics work and plastic parts that need a safe, firm hold. |
|
 |
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 perfect for 3D printing hobbyists who need strong, reliable threads in their plastic parts. |
|
 |
ruthex Threaded Inserts M2 + M3 + M4 + M5 Assortment Box – 70 + 100 + 50 + 50 Pieces – Brass Heat Set Insert for Plastic Parts – Metric knurled Nuts – Insert by Heat into 3D Printing Components |
This kit is for makers. It is good for 3D prints. It fits M2 and M3 holes. It fits M4 and M5 holes. Use it to fix parts. Use it to join parts. The brass is strong. The set is neat. It saves time. It is easy to use. |
|
 |
ZWMSSLL 1/4″-20 Heat Set Threaded Inserts,30 Pieces 1/4″-20x8x8 Heat Set Insert for 3D Printing Components and Plastic Parts,Brass Knurled Nuts |
Perfect for 3D printing enthusiasts and professionals, these heat set threaded inserts are ideal for anyone working with thermoplastics like PLA, PETG, ABS, PPS, or PP. Whether you’re creating 3D printed objects, injection-molded parts, or automotive casings, these brass knurled nuts offer reliable and durable solutions for your projects. |
|
 |
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 kit is for makers. It is for people who build. It is for 3D print fans. Use it for plastic parts. It fits M2 and M3 bolts. It fits M4 and M5 bolts too. It has brass nuts. The set is strong. The case keeps it neat. You can fix things. You can make things. This tool is great. |
Detailed Reviews
Discover the top 10 brass inserts for 3D prints, handpicked for quality and value. Each product is reviewed for performance and ease of use, ensuring you find the perfect fit. Whether you’re a beginner or a pro, this guide makes choosing reliable brass inserts simple and stress-free.
1. FFVRVSS 600+7Pcs M2 M2.5 M3 M4 M5 M6 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 all-in-one kit includes the 6 most common metric sizes for 3D printing: M2, M2.5, M3, M4, M5, and M6. It comes with an upgraded heat set tool, so you don’t need to buy extra tools. Save time and money with this complete solution.
Made from premium brass, these inserts resist corrosion, breakage, and deformation. The high-precision design ensures a secure grip and stronger hold. Perfect for long-lasting, reliable fastenings in any project.
Each size is stored in its own sealed compartment for easy organization. Clear labels make it simple to find the right insert quickly. Works with all thermoplastics and various projects, from 3D printing to electronics.
| Pros | Cons |
|---|---|
|
|
Perfect For:
This set is perfect for 3D printing fans, DIY makers, and anyone who needs strong metal inserts for plastic parts. It also suits engineers and hobby builders who want fast, clean, and secure results.
Ready to Purchase?
2. 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 is a complete solution for 3D printing and plastic projects. It includes a 60W digital soldering iron and 380 threaded inserts. This kit is easy to use and versatile.
The soldering iron works with 110V/220V and has a wide temperature range. It comes with detachable tips for different insert sizes. The brass inserts are durable and heat-resistant, perfect for strong connections.
This kit is ideal for 3D printing and works with PLA, PETG, ABS, and more. It includes temperature recommendations for each material, ensuring perfect results every time.
| Pros | Cons |
|---|---|
|
|
Perfect For:
This kit is perfect for makers, 3D‑printing fans, and anyone who wants strong, clean threads in plastic parts with ease. It also suits beginners who want simple tools that work fast and give smooth, solid results.
Ready to Purchase?
3. FFVRVSS 320+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
This all-in-one kit fits your 3D printing needs perfectly. It features five common metric sizes for any project. You also get an upgraded heat set tool at a great price.
The premium brass parts conduct heat well and resist rust. These sturdy nuts will not break or bend during use.
Spiral knurling provides a strong grip and high strength. Clear labels make it easy to find each size fast.
| Pros | Cons |
|---|---|
|
|
Perfect For:
This kit is perfect for makers and hobbyists. Use these brass inserts to build strong 3D prints.
Ready to Purchase?
4. HANGLIFE Heat-Set Threaded Inserts, M3 Heat Set Insert for 3D Printing Components and Plastic Parts – Brass Metric Knurled Nuts (100 Pieces)
Upgrade your 3D prints with HANGLIFE M3 brass inserts. They melt into plastic for a strong, secure hold. Your parts will last much longer.
These inserts are easy to install. They resist pulling out. You get a tight fit every time.
The 100-piece set works with many plastics. Choose the right size for your project. Durable brass fights rust and wear.
| Pros | Cons |
|---|---|
|
|
Perfect For:
This brass nut is for people who use 3D prints. It makes your plastic parts strong. It is quick to use. It is easy to use. This threaded part fits many plastic tools. It is great for hobbyists. It is great for pro work. You get one hundred pieces. This helps you build sturdy projects.
Ready to Purchase?
5. Professional Heat Set Insert Tool Kit: 80W Soldering Iron Heat Insert Tool with 520pcs Brass Inserts & Heat Set Insert Tips (M2-M8) for 3D Printing
This Professional Heat Set Insert Tool Kit is designed for quick and easy work. It features an 80W soldering iron that heats up fast and has a clear LED display.
The tool is powerful and comes with 7 brass tips for different sizes. It includes 520 lead-free brass inserts. Perfect for use with PLA, ABS, and Nylon filaments.
Save money with this all-in-one kit. It is backed by a 12-month warranty from a trusted brand. Get reliable results every time.
| Pros | Cons |
|---|---|
|
|
Perfect For:
This Professional Heat Set Insert Tool Kit is perfect for 3D printing enthusiasts and makers who want to create strong, functional prototypes. It’s ideal for anyone using PLA, ABS, or Nylon and needs reliable, corrosion-resistant threads.
Ready to Purchase?
6. 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)
The Ktehloy 400Pcs Metric Heat Set Insert Kit offers a large selection of high-quality brass threaded inserts perfect for plastic and 3D printing projects. These inserts come in sizes M2, M2.5, M3, M4, M5, and M6, designed to fit various plastic parts securely.
Made from durable brass, these inserts resist heat over 300°C and corrosion. They have precise threading for a strong hold. The knurled design boosts grip and prevents slipping.
These inserts are easy to install with a soldering iron or heat method. They work well with many plastics like PLA, ABS, and PETG. Use them for 3D prints, injection-molded parts, or electronics for a reliable, lasting connection.
| Pros | Cons |
|---|---|
|
|
Perfect For:
This is perfect for 3D printing fans, makers, and repair pros who need strong, neat threads in plastic. It is also great for electronics work and plastic parts that need a safe, firm hold.
Ready to Purchase?
7. Kadrick 520Pcs M2 M3 M4 M5 Threaded Inserts Assortment Kit for 3D Printing Components, Metric Brass Knurled Nuts, Insert by Heat into Plastic Parts
Add strong threads to your 3D prints with this brass insert kit. It works by heating the inserts into plastic for a secure fit.
The set has M2 to M5 sizes in a labeled box. Each insert has a knurled grip for high strength. Kadrick backs it with a 24-month warranty.
| Pros | Cons |
|---|---|
|
|
Perfect For:
Kadrick 520Pcs is perfect for 3D printing hobbyists who need strong, reliable threads in their plastic parts.
It’s also ideal for DIY makers who want a quick, heat‑set solution that stays corrosion‑free and easy to use.
Ready to Purchase?
8. ruthex Threaded Inserts M2 + M3 + M4 + M5 Assortment Box – 70 + 100 + 50 + 50 Pieces – Brass Heat Set Insert for Plastic Parts – Metric knurled Nuts – Insert by Heat into 3D Printing Components
The ruthex threaded inserts give your 3D prints a strong metal thread. They slide into place with simple heat and stay tight.
Each insert has a firm grip thanks to its smart shape. The brass body keeps it strong, smooth, and ready for long use.
The box has many sizes. The inserts fit many plastics. The parts stay solid.
| Pros | Cons |
|---|---|
|
|
Perfect For:
This kit is for makers. It is good for 3D prints. It fits M2 and M3 holes. It fits M4 and M5 holes. Use it to fix parts. Use it to join parts. The brass is strong. The set is neat. It saves time. It is easy to use.
Ready to Purchase?
9. ZWMSSLL 1/4″-20 Heat Set Threaded Inserts,30 Pieces 1/4″-20x8x8 Heat Set Insert for 3D Printing Components and Plastic Parts,Brass Knurled Nuts
Get thirty strong inserts. They fit 1/4″-20 bolts.
Heat sets them. They hold tight. They stay put.
Use them in 3D prints. They work well.
| Pros | Cons |
|---|---|
|
|
Perfect For:
Perfect for 3D printing enthusiasts and professionals, these heat set threaded inserts are ideal for anyone working with thermoplastics like PLA, PETG, ABS, PPS, or PP. Whether you’re creating 3D printed objects, injection-molded parts, or automotive casings, these brass knurled nuts offer reliable and durable solutions for your projects.
Ready to Purchase?
10. 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 Brass Threaded Inserts kit is super handy. It includes the 5 most used sizes for 3D printers. The upgraded heat set tool makes installation easy and fast.
Made from strong brass, these inserts last long and resist rust and breakage. Each size is stored neatly in its own box with clear labels for quick access.
| Pros | Cons |
|---|---|
|
|
Perfect For:
This kit is for makers. It is for people who build. It is for 3D print fans. Use it for plastic parts. It fits M2 and M3 bolts. It fits M4 and M5 bolts too. It has brass nuts. The set is strong. The case keeps it neat. You can fix things. You can make things. This tool is great.
Ready to Purchase?
Buying Guide
Strong threads make your 3D prints feel solid. Brass inserts help you get that strength fast.
They melt in smooth. They hold tight. They make every project feel better to use.
When you pick the right inserts, your prints feel more real. You twist a screw, and it locks in place with a clean, firm click. No stripping. No wobble. Just a solid, confident fit that makes your work feel pro.
-
Size Range:
Pick inserts that match the thread sizes you use most. This saves time and keeps your projects simple. A wide size range gives you more freedom. -
Material Quality:
Choose solid brass for long life. It resists heat and stays strong under pressure. Good brass will not bend or crack. -
Knurling Style:
Look for deep knurling. It grips the plastic better. This keeps the insert from spinning or pulling out. -
Heat Set Tool:
A good heat tool makes the job easy. It melts the insert in clean and straight. This gives you a tight, even fit. -
Temperature Control:
Stable heat helps you avoid damage. It keeps the plastic from burning. It also helps the insert sit smooth. -
Plastic Type:
Check that the inserts work with your filament. PLA, ABS, and PETG each melt differently. The right insert will bond well with all of them. -
Thread Accuracy:
Clean, sharp threads make screws glide in. They also stop cross‑threading. This keeps your parts strong. -
Kit Organization:
A labeled box saves time. You find the right size fast. It keeps your workspace neat. -
Insert Count:
More pieces mean fewer stops. You can finish big projects without running out. It also gives you room to test. -
Tool Tips Included:
Extra tips help you match each insert size. This keeps the heat even. It also improves accuracy. -
Warranty or Support:
A good warranty shows trust in the product. It gives you peace of mind. It also helps if you ever need replacements.