Are you looking for the best M4 thread brass insert for your 3D prints? We’ve got you covered with a curated list of top-quality options to enhance your projects.
Looking for the best M4 brass inserts for your 3D prints? These small but mighty parts make a big difference. They add strong, reliable threads to your plastic creations.
You can trust these heat-set inserts for secure connections. They are easy to install and built to last.
Imagine finishing a project and knowing your parts will stay firmly connected, no matter what. That’s the power of the right M4 brass insert. You’ve come to the right place for guidance on finding the perfect ones to make your 3D prints even better.
List of Top 10 M4 Thread Brass Insert For 3D Prints
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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 Kadrick 520Pcs M2 M3 M4 M5 Threaded Inserts Assortment Kit is perfect for 3D printing enthusiasts who need to add strong, reliable threads to their plastic parts. If you’re looking for a secure and easy way to enhance your 3D printed creations, this kit is for you! |
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Yaocom 300 Pcs M4 Threaded Inserts M4 x D6 x L6 Heat Set Inserts Brass 3D Printing Knurled Metric Nuts for Plastic, 3D Printing Components |
Yaocom 300 Pcs M4 Threaded Inserts are perfect for 3D printing fans, makers, and DIY lovers. They are also great for fixing computers, electronics, and circuit boards. |
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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 FFVRVSS Brass Threaded Inserts Kit is perfect for 3D printing enthusiasts, makers, and DIYers who need strong, reliable fastenings for their projects. If you’re working with plastics and want a hassle-free, all-in-one solution for secure connections, this kit is for you. |
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ZWMSSLL M4 Heat-Set Threaded Inserts, M4x8.1×6.3mm(30Pieces) Heat Set Insert for 3D Printing Components and Plastic Parts,Brass Metric Knurled Nuts |
Perfect for 3D printing enthusiasts and professionals, these M4 heat-set threaded inserts are ideal for anyone working with plastic parts or thermoplastics. Whether you’re creating automotive casings, laptop shells, or custom 3D printed objects, these durable brass inserts ensure strong, reliable fastening every time. |
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350Pcs Pofsnnx M2 M3 M4 M5 M6 Threaded Inserts, Brass Heat Set Insert for Plastic and 3D Printing Components, Metric Knurled Nut Classification Combination Kit(Threaded Inserts Set) |
This threaded inserts set is perfect for 3D printing fans and DIY lovers. It’s also great for fixing plastic parts in robotics or RC models. |
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uxcell Knurled Insert Nuts, 50pcs M4 x 10mm L x 6mm OD 3D Printing Brass Nuts Female Threaded Inserts Brass Heat Set Insert Embedment Nuts |
These uxcell Knurled Insert Nuts are perfect for 3D printing enthusiasts, electronics hobbyists, and professionals who need reliable and durable threaded inserts. They’re easy to install and stay firmly in place, making them ideal for projects like injection molding, computer parts, and circuit board fixing. |
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Kadrick 420Pcs M3 M4 M5 Threaded Inserts Assortment Kit for 3D Printing Components, Metric Brass Knurled Nuts, Insert by Heat into Plastic Parts |
This Kadrick 420Pcs M3 M4 M5 Threaded Inserts Assortment Kit is absolutely perfect for 3D printing enthusiasts and makers who need to add strong, reliable threads to their plastic parts. If you’re looking to create durable, professional-grade components with ease, this kit is your go-to solution. |
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ruthex M4 Threaded Inserts – 50 Pieces RX-M4x8.1 Brass Heat Set Insert for Plastic Parts – Metric knurled Nuts – Insert by Heat into 3D Printing Components |
This 50-piece set of M4 brass threaded inserts is perfect for 3D printing enthusiasts and makers who want to add strong, reusable threads to their plastic parts. They are ideal for projects using PLA, PETG, ABS, and other thermoplastics, offering a firm hold and easy application with heat or ultrasound. |
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100pcs M4 Brass Threaded Inserts, Metric Knurled Nuts, M4x6x6 Heat Set Insert for 3D Printing Components and Plastic Parts |
These M4 brass threaded inserts are perfect for 3D printing fans and anyone working with plastic parts. They’re easy to use and work great with common plastics like PLA and ABS. |
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HANGLIFE Heat-Set Threaded Inserts, M4 Heat Set Insert for 3D Printing Components and Plastic Parts – Brass Metric Knurled Nuts (100 Pieces) |
These M4 heat-set threaded inserts are perfect for 3D printing enthusiasts and makers looking to add strong, reliable threads to their plastic parts. They’re ideal for anyone needing to securely fasten components in projects like 3D printers or electronic enclosures. |
Detailed Reviews
Discover the top 10 M4 thread brass inserts for 3D prints, handpicked for quality, durability, and ease of use. Whether you’re a pro or a beginner, this guide ensures you find the perfect fit for your projects. Dive in to upgrade your 3D printing game with reliable and affordable solutions.
1. Kadrick 520Pcs M2 M3 M4 M5 Threaded Inserts Assortment Kit for 3D Printing Components, Metric Brass Knurled Nuts, Insert by Heat into Plastic Parts

The Kadrick 520Pcs Threaded Inserts Assortment Kit is perfect for 3D printing. It includes various brass inserts in M2, M3, M4, and M5 sizes, making it easy to add threads to your projects.
Each insert is clearly labeled for quick access. They provide strong grip and durability. You can trust Kadrick for high-quality fasteners.
| Pros | Cons |
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Perfect For:
This Kadrick 520Pcs M2 M3 M4 M5 Threaded Inserts Assortment Kit is perfect for 3D printing enthusiasts who need to add strong, reliable threads to their plastic parts. If you’re looking for a secure and easy way to enhance your 3D printed creations, this kit is for you!
Ready to Purchase?
2. Yaocom 300 Pcs M4 Threaded Inserts M4 x D6 x L6 Heat Set Inserts Brass 3D Printing Knurled Metric Nuts for Plastic, 3D Printing Components

Get 300 M4 threaded inserts for all your projects. These brass nuts are perfect for 3D printing and more. They offer great value and plenty of supply.
Crafted from quality brass, these inserts are strong and won’t easily deform. You can rely on their smooth surface and burr-free finish for a professional look.
Installation is a breeze with these heat set inserts. They provide a secure grip once in place, ensuring your components stay firmly fixed.
| Pros | Cons |
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Perfect For:
Yaocom 300 Pcs M4 Threaded Inserts are perfect for 3D printing fans, makers, and DIY lovers. They are also great for fixing computers, electronics, and circuit boards.
Ready to Purchase?
3. 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 rust, breaks, and wear. The high-precision design ensures a secure grip and strong hold. Perfect for long-lasting projects in any condition.
Each size is stored in its own sealed compartment for easy access. Clear labels make finding the right one quick and simple. Works with all thermoplastics and various projects.
| Pros | Cons |
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Perfect For:
This FFVRVSS Brass Threaded Inserts Kit is perfect for 3D printing enthusiasts, makers, and DIYers who need strong, reliable fastenings for their projects. If you’re working with plastics and want a hassle-free, all-in-one solution for secure connections, this kit is for you.
Ready to Purchase?
4. ZWMSSLL M4 Heat-Set Threaded Inserts, M4x8.1×6.3mm(30Pieces) Heat Set Insert for 3D Printing Components and Plastic Parts,Brass Metric Knurled Nuts

The ZWMSSLL M4 Heat-Set Threaded Inserts are perfect for your 3D printed parts. This pack contains 30 pieces of M4x8.1×6.3mm inserts.
These inserts are made from high-quality brass. They are strong, durable, and can withstand high temperatures. You can use them in many thermoplastics like PLA, ABS, and PETG.
Installing these inserts is easy. Just heat them with a common soldering iron. They are reusable, making them a great choice for various projects.
| Pros | Cons |
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Perfect For:
Perfect for 3D printing enthusiasts and professionals, these M4 heat-set threaded inserts are ideal for anyone working with plastic parts or thermoplastics. Whether you’re creating automotive casings, laptop shells, or custom 3D printed objects, these durable brass inserts ensure strong, reliable fastening every time.
Ready to Purchase?
5. 350Pcs Pofsnnx M2 M3 M4 M5 M6 Threaded Inserts, Brass Heat Set Insert for Plastic and 3D Printing Components, Metric Knurled Nut Classification Combination Kit(Threaded Inserts Set)

Upgrade your plastic and 3D printing projects with these premium brass threaded inserts. They offer excellent heat conduction and corrosion resistance for durable connections. Get strong, reliable hold in your materials.
The knurled outer design grips tightly, preventing loosening. These inserts boast high pull-out resistance for secure fastening. Installation is a breeze with a soldering iron or heat-set tool.
This 350-piece professional pack is perfect for all your needs. It includes M2, M3, M4, M5, and M6 variants for maximum versatility.
| Pros | Cons |
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Perfect For:
This threaded inserts set is perfect for 3D printing fans and DIY lovers. It’s also great for fixing plastic parts in robotics or RC models.
Ready to Purchase?
6. uxcell Knurled Insert Nuts, 50pcs M4 x 10mm L x 6mm OD 3D Printing Brass Nuts Female Threaded Inserts Brass Heat Set Insert Embedment Nuts

These brass nuts are perfect for your projects. They are durable and easy to use. Get a pack of 50 for great value.
They offer strong holding power thanks to their special design. This means your parts will stay securely in place.
Use them for 3D printing or electronics. They provide a reliable connection every time.
| Pros | Cons |
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Perfect For:
These uxcell Knurled Insert Nuts are perfect for 3D printing enthusiasts, electronics hobbyists, and professionals who need reliable and durable threaded inserts. They’re easy to install and stay firmly in place, making them ideal for projects like injection molding, computer parts, and circuit board fixing.
Ready to Purchase?
7. Kadrick 420Pcs M3 M4 M5 Threaded Inserts Assortment Kit for 3D Printing Components, Metric Brass Knurled Nuts, Insert by Heat into Plastic Parts

Upgrade your 3D prints with Kadrick’s brass threaded inserts. These easy-to-use nuts add strong threads to your plastic parts. They are perfect for DIY projects and professional builds.
These inserts are designed for 3D printing, embedding easily with heat. The knurled design ensures a super secure grip, holding tight even under pressure.
The kit includes M3, M4, and M5 sizes for common needs, clearly labeled for quick selection. Kadrick offers a 24-month warranty, so you can buy with confidence.
| Pros | Cons |
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Perfect For:
This Kadrick 420Pcs M3 M4 M5 Threaded Inserts Assortment Kit is absolutely perfect for 3D printing enthusiasts and makers who need to add strong, reliable threads to their plastic parts. If you’re looking to create durable, professional-grade components with ease, this kit is your go-to solution.
Ready to Purchase?
8. ruthex M4 Threaded Inserts – 50 Pieces RX-M4x8.1 Brass Heat Set Insert for Plastic Parts – Metric knurled Nuts – Insert by Heat into 3D Printing Components

Upgrade your 3D printed projects with ruthex M4 Threaded Inserts! These 50-piece brass heat set inserts are designed for easy integration into your plastic parts. Simply use heat from a soldering iron or ultrasound to embed them securely.
These knurled nuts offer a firm hold. They provide balanced torque for easy tightening and loosening. Insertion is made simple and guided.
Crafted from lead-free brass, these inserts are stable and long-lasting. They boast excellent corrosion resistance and thermal conductivity, making them ideal for a wide range of plastics like PLA, PETG, and ABS.
| Pros | Cons |
|---|---|
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Perfect For:
This 50-piece set of M4 brass threaded inserts is perfect for 3D printing enthusiasts and makers who want to add strong, reusable threads to their plastic parts. They are ideal for projects using PLA, PETG, ABS, and other thermoplastics, offering a firm hold and easy application with heat or ultrasound.
Ready to Purchase?
9. 100pcs M4 Brass Threaded Inserts, Metric Knurled Nuts, M4x6x6 Heat Set Insert for 3D Printing Components and Plastic Parts

These M4 brass threaded inserts are perfect for 3D printing and plastic parts. They offer a strong, stable connection that won’t strip easily. Made from high-quality brass, they’re built to last.
They work well with PLA, ABS, PPS, PP, and PETG plastics. Installation is simple—use heat or ultrasonic tools. No special equipment needed.
Each pack includes 100 inserts with M4 internal threads. They measure 6mm in length and 6mm in outer diameter. Packaged in a clear PE bag and recyclable PP box.
| Pros | Cons |
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Perfect For:
These M4 brass threaded inserts are perfect for 3D printing fans and anyone working with plastic parts. They’re easy to use and work great with common plastics like PLA and ABS.
Ready to Purchase?
10. HANGLIFE Heat-Set Threaded Inserts, M4 Heat Set Insert for 3D Printing Components and Plastic Parts – Brass Metric Knurled Nuts (100 Pieces)

Upgrade your 3D prints with HANGLIFE heat-set threaded inserts. They fit perfectly and offer a secure way to connect parts. These brass inserts are easy to use and add strength to your creations.
Crafted from durable brass, they resist rust and heat. These versatile inserts work with many plastics, making them ideal for all your projects.
| Pros | Cons |
|---|---|
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Perfect For:
These M4 heat-set threaded inserts are perfect for 3D printing enthusiasts and makers looking to add strong, reliable threads to their plastic parts. They’re ideal for anyone needing to securely fasten components in projects like 3D printers or electronic enclosures.
Ready to Purchase?
Buying Guide
Looking for the best M4 brass inserts for your 3D prints? These small parts make a big difference. They add strong, reliable threads to your projects.
Choosing the right M4 brass inserts can be fun and rewarding. Imagine finishing a project and knowing your parts will stay firmly connected. Here’s what to consider when buying:
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Material Quality:
Choose high-quality brass for durability and corrosion resistance. It ensures your inserts last longer and work well with various plastics. -
Size and Fit:
Make sure the M4 size matches your project needs. Check the length and outer diameter for a perfect fit in your 3D prints. -
Ease of Installation:
Look for heat-set inserts that are easy to install. They should work well with common tools like soldering irons or heat guns. -
Quantity and Value:
Consider how many inserts you need. Buying in bulk packs often saves money and ensures you have enough for multiple projects. -
Knurled Design:
A knurled outer surface provides a strong grip. It prevents the insert from loosening over time, keeping your parts secure. -
Compatibility:
Ensure the inserts work with your plastic type, such as PLA, ABS, or PETG. Check for compatibility to avoid issues. -
Brand Reputation:
Choose trusted brands known for quality. They often offer warranties and reliable customer support. -
Packaging and Organization:
Look for well-organized kits with clear labels. This makes it easy to find the right size quickly and keeps your workspace tidy.
With these factors in mind, you’ll find the perfect M4 brass inserts to enhance your 3D prints. Happy building!