10 Best M2 Screws And Heat Set Inserts of 2025

Tested and Reviewed: Top 10 M2 Screws And Heat Set Inserts deals with expert ratings from 8.1 to a perfect 10

March 2026 Edition

Editor's Choice

9.7

Mardatt

Mardatt 385Pcs M2 M2.5 M3 M4 M5 Brass Threaded Inserts with Stainless Steel Hex Socket Head Cap Screws Nuts Kit, Brass Heat Set Insert Knurled Nuts & Machine Screws Nuts for 3D Printing Components

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Editor's bottom line:

“This m2 screws and heat set inserts is the best one we tested. In terms of quality, brand and price, we couldn't ask for more.”

Main Highlights

1What You Will Get: You will get 385pcs M2, M2.5, M3, M4, M5 bolt nut and threaded insert set, including 65pcs threaded insert, 105pcs hex socket head cap screws, 105pcs hex nuts, 105pcs flat washers, 5pcs hex wrenches, packed in two plastic boxes for easy carrying and storage. Various sizes to meet your multiple needs.
2304 Stainless Steel & Brass Material: The screws and nuts are made of 304 stainless steel, which has high hardness and tensile strength, superior rust resistance, good oxidation resistance and durability. The heat set insert are made of brass, which has good thermal conductivity, oxidation resistance, and durability. No harmful substances will be released, ensuring that each nut insert can be used for a long time.
3Easy to Use: Our machine screw kits are easy to use, come with matching nuts and flat washers, wrenches, no need to buy additional parts, save effort to use the tool and don't hurt your hands. Brass threaded sleeve inserts can be installed into components of 3D printers by heat or ultrasonic methods, or molded during the injection molding process. Using a common soldering iron, you can easily place them into the holes of a 3D printer.
4Wide Application: The screw threaded insert kit is perfect for home, electronics, automotive. From furniture to electronics, they can easily do the job of 3D printing and laser cutting items. Threaded insert set can be embedded in a wide range of plastics, including PLA, PETG, PPS, PP and other materials. It is widely used in electronics, hardware, lighting, toys, furniture, medical, sports equipment and other industries.
5Precision Craftsmanship: Clear and smooth threads ensure the stability and reliability of the screws and threaded kits, preventing the threads from slipping or hurting your hands during rotation. Knurling significantly enhances the anti-torque and tensile strength of the threaded kits, ensuring a stronger fastening. Recessed nuts feature a guide element that eliminates the need for countersinks or grooves, making your work easier and more efficient.

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Picked by 397 people today

9.5

Kadrick

300 Pcs M2 M2.5 Threaded Inserts for Plastic with Heat Set Tips,M2 & M2.5 Heat Set Inserts Kit,Brass Inserts for 3D Pringting

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Main Highlights

Standard M2 M2.5 Sizes & Included Tip: M2 size (3mm OD, 2mm-4mm Height, 0.4mm Pitch) threaded inserts, M2.5 size (3.5mm OD,3mm-4mm Height, 0.45mm Pitch) threaded inserts,compatible with M2 M2.5 screws. Includes a matching soldering iron tip for installation.
Ideal Heat-Set Inserts for 3D Printing: Perfect brass threaded inserts for plastics. Easily embed into 3D printed parts or thermoplastics (PLA, ABS, PETG) using a soldering iron with the included Heat Set Insert Tips.
Premium Lead-Free Brass & Durability: Made from high-quality, lead-free brass for excellent heat conduction, corrosion resistance, and strength. Withstands over 300°C / 572°F (ideal for heat setting), resisting breakage and deformation.
Knurled Grip & Easy Installation: Knurled surface (45° design) provides superior pull-out resistance and torque holding vs. smooth inserts. Built-in lead-in allows easy installation into plastic without countersinking.
Organized Kit & Warranty: Supplied in a reinforced, compartmentalized box (kit style) with clear labeling for easy use. Backed by Kadrick's testing and a 24-month warranty.

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9.5

Hanglife

HANGLIFE Heat-Set Threaded Inserts, M2 Heat Set Insert for 3D Printing Components and Plastic Parts - Brass Metric Knurled Nuts (100 Pieces)

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Main Highlights

Perfect Fit for Your 3D Printed Parts: Retrofit your 3D printed components seamlessly with our threaded inserts, effortlessly embedded using heat or ultrasound into blind- or through-holes. Providing a reliable and secure method for fastening components in 3D printing projects. Elevate the strength and functionality of your creations with ease.
Secure Hold with Simple Application: The opposite spiral-shaped knurled nuts provide a balanced high tightening torque, ensuring a stable connection. Our heat set inserts offer seamless installation onto plastic components, resisting torque and preventing pull-out.
Durable and Corrosion-Resistant: Crafted from high-quality brass, our threaded inserts provide optimal corrosion resistance and thermal conductivity. Exceptional durability and high resistance to breaking or deformation make them a reliable choice for various applications.
Versatile Compatibility with Plastics: Designed for all thermoplastics, including PLA, PETG, ABS, PPS, PP, and more, these inserts find applications in 3D printers, electrical molding machines, automotive plastic shells, and laptop molds. Their versatility ensures compatibility across a wide range of materials.
Practical Thread Insert Set: This M2x3x3 set includes 100 insert nuts with M2 internal thread, 3mm width, and 3.0mm length. Explore various dimensions of heat-set inserts at HANGLIFE to find the perfect fit for your specific needs. Drop down the variations to discover more choices.

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9.2

Mardatt

Mardatt 230Pcs M2 Brass Threaded Inserts with Hex Socket Head Cap Screws Kit, Brass Heat Set Insert Metric Knurled Nuts & Machine Screws for Plastic 3D Printing Components

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Main Highlights

1What You Will Get: You will get 230pcs M2 bolt and threaded insert set, including 115pcs brass threaded insert, 115pcs hex socket head cap screws, packed in two plastic boxes for easy carrying and storage. Various sizes to meet your multiple needs.
2Durable Material: The screws are made of durable metal with black galvanized surface, which has high hardness and tensile strength, superior rust resistance, good oxidation resistance and durability. The heat set insert are made of brass, which has good thermal conductivity, oxidation resistance, and durability. No harmful substances will be released, ensuring that each nut insert can be used for a long time.
3Easy to Use: Our machine screw kits are easy to use, no need to buy additional parts, save effort to use and don't hurt your hands. Brass threaded sleeve inserts can be installed into components of 3D printers by heat or ultrasonic methods, or molded during the injection molding process. Using a common soldering iron, you can easily place them into the holes of a 3D printer.
4Wide Application: The screw threaded insert kit is perfect for home, electronics, automotive. From furniture to electronics, they can easily do the job of 3D printing and laser cutting items. Threaded insert set can be embedded in a wide range of plastics, including PLA, PETG, PPS, PP and other materials. It is widely used in electronics, hardware, lighting, toys, furniture, medical, sports equipment and other industries.
5Precision Craftsmanship: Clear and smooth threads ensure the stability and reliability of the screws and threaded kits, preventing the threads from slipping or hurting your hands during rotation. Knurling significantly enhances the anti-torque and tensile strength of the threaded kits, ensuring a stronger fastening. Recessed nuts feature a guide element that eliminates the need for countersinks or grooves, making your work easier and more efficient.

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9.0

Ktehloy

Ktehloy 400Pcs Threaded Inserts, M2 M2.5 M3 M4 M5 M6 Female Thread Metric Knurled Nuts Assortment Kit, Brass Heat Set Insert for Plastic and 3D Printing Components (Threaded Inserts Ket)

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Main Highlights

Package Content- The package includes 400 high-quality metric threaded inserts for plastic heat-setting. With a large quantity available, it meets the needs for connecting numerous 3D printing accessories. The threaded brass inserts are approximately sized at M2 M2.5 M3 M4 M5 M6. Please ensure the nut's size matches your plastic parts effectively.
High-Quality Threaded Inserts- Crafted from top-tier brass materials, these threaded inserts boast outstanding thermal conductivity, corrosion resistance, and durability. They exhibit remarkable resistance against breakage and deformation. Withstanding temperatures exceeding 300°C / 572°F, they easily endure the harsh heat generated during plastic thermal shaping processes.
Precision Craftsmanship- High-precision and clear threading ensures stability and reliability, preventing thread slippage during rotation. The 45-degree angled knurling significantly enhances torque resistance and tensile strength, ensuring a stronger fastening. The embedded nuts feature guiding elements, eliminating the need for countersinking or recessing, making your work more convenient and efficient.
Easy to Use- Brass threaded inserts can be installed into components of a 3D printer through heating or ultrasonic methods, or molded during the injection process. They are also suitable for circuit board assembly and the electronics field. With a common soldering iron, you can easily place them into the holes of 3D prints.
Wide Application - These inserts are designed for use with all thermoplastics, including materials like PLA, PETG, ABS, PPS, PP, and others. Whether installing them in 3D printed objects, injection-molded plastic parts, automotive plastic casings, or laptop shells, these inserts offer reliable and durable solutions.

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8.8

FFVRVSS

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

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Main Highlights

Ultra AffordableBased on real user data, weve included the 5 most commonly used metric knurled nut sizes for 3D printers: M2, M2.5, M3, M4, and M5. This kit also comes with an upgraded extended-tip heat set toolperfectly compatible, Skip the hassle of buying tools separately; this one-stop solution checks all your boxes with just one purchase.
Top-Tier Brass QualityMade from premium brass, our heat set inserts and heat set tool offer exceptional thermal conductivity. The heavy-duty brass resists oxidation, corrosion, breakage, and deformation, outperforming flimsy alternatives that fail quickly. These inserts stay strong and reliable for years, ensuring rock-solid fastenings even in harsh conditions.
Precision Design for Secure GripHigh-precision threading prevents slippage during installation, while 45-degree spiral knurling boosts torque resistance and tensile strength. The knurled exterior creates tight friction with plastic, delivering stronger holding power than straight-threaded inserts. Built-in guides eliminate the need for countersinkingjust insert and secure for a firm fit.
Clear Identification & CategorizationEach threaded insert size is stored in its own sealed compartment, so no more tangled messes. Paired with clear, easy-to-read size labels, you can grab the right one in seconds and store them neatly afterward. Keep your workspace organized, even with long-term, Even non-professionals can handle it with total ease.
Universal Compatibility & Quality AssuranceWorks seamlessly with all thermoplastics (PLA, PETG, ABS, PPS, PP) and diverse projectsfrom 3D-printed parts to automotive shells and laptop casings. Every piece undergoes strict quality inspections. Whether for electronics, toys, or furniture, these inserts deliver long-lasting, reliable retention. Buy with confidence!

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8.6

Preciva

Preciva Threaded Inserts Set, 716Pcs Heat Set Inserts Nuts Bolts with M2 M3 M4 M5 M6 Insert-Tip, 60W Soldering Iron and Holder, for 3D Printer Parts or Plastic Parts

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Main Highlights

Threaded Inserts Set: 1 x 60W digital soldering iron, 5 x heat-set insert tips (M2/M3/M4/M5/M6), 2 x soldering tip connecting rods, 179Pcs threaded inserts, 179Pcs bolts, 179Pcs nuts, 179Pcs washers, 1 x soldering iron holder and 1 x tweezer.
Easy Installation of Heat-Set Inserts: Our heat-set insert tip kit ensures seamless and clean embedding of threaded inserts into plastic, forming a brand new, fastenable thread.
Complete Accessories: 5 popular sizes of heat-set inserts with a comprehensive range of installation tools and fasteners. Friendly to DIY enthusiasts, professionals and beginners.
Convenient Tip Replacement Design: The split design allows you to easily switch between tips of different sizes without unscrewing the sleeve of the soldering iron. You can easily replace the tip by simply unscrewing the old tip and installing the new one.
No Damage to 3D Printed Parts: Due to the ideal geometry of the tip, the risk of damaging the surface around the threaded insert is effectively reduced. Protect the results of your hours of careful printing.
Customer Support: Contact us for assistance with product use or concerns. Our dedicated team provides prompt solutions to ensure your satisfaction.

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8.3

Moicstiy

Moicstiy 150 Pcs M2 Threaded Inserts, M2x4x3.2 Heat Set Insert for 3D Printing, Brass Metric Knurled Nuts

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Main Highlights

Package content: Contains 150 pcs brass heat set insert with thread diameter of M2 and overall size of 4mm*3.2mm, providing sufficient supply for all your 3D printing projects.
Material: This M2 threaded inserts is made of brass with high hardness and corrosion resistance and thermal conductivity, guaranteeing long-lasting performance and reliability.
Features:This M2 threaded inserts has a spiral knurled design, and the opposite spiral knurled nut provides a balanced high tightening torque and is not easy to fall off after installation.
Wide application: This M2 threaded inserts is widely used in 3D printers, laptop molds, circuit board assembly, etc. It is suitable for all thermoplastics such as PLA, PETG, and ABS
Easy installation: Threaded inserts can be installed into the 3D printer's components by heating or ultrasonic methods, allowing you to seamlessly transform your 3D printed components, or they can be molded during injection.

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8.1

QSJ

440Pcs Threaded Inserts Bolt Set M2.5 M3 Heat Set Insert Brass Nut with Bolt for 3D Printed Plastic Parts

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Main Highlights

Package 440pcs set with 140 M2.5x4x3.5 threaded inserts, 140 M2.5x5 bolts, 80 M3x4x5 threaded inserts, 80 M3x5 bolts, and M2.5/M3 soldering iron tips for precise assembly.
Material Our threaded inserts are crafted from durable brass, offering excellent resistance to corrosion and wear, while the bolts are made from high-quality stainless steel, providing superior strength and longevity.
Enhanced Performance with Combined Use Using the inserts and bolts together maximizes the holding power and structural integrity of your assemblies. The threaded engagement between the brass inserts and stainless steel bolts creates a robust connection, reducing the risk of loosening over time and ensuring long-lasting durability.
Abundant Quantity With 440 pieces in total, this set provides an ample supply of fasteners for even the most extensive projects. The generous quantity ensures you always have the right fastener on hand when you need it.
Ideal for 3D Printing Applications Perfectly suited for securing 3D-printed parts, this set allows for strong and secure connections that maintain the integrity of your projects. Whether you're assembling intricate models or functional prototypes, these fasteners provide the stability and precision required.

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8.1

ruthex

ruthex M2 Threaded Inserts - 70 Pieces RX-M2x4 Brass Heat Set Insert for Plastic Parts - Metric knurled Nuts - Insert by Heat into 3D Printing Components

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Main Highlights

M2 THREAD INSERTS FOR YOUR 3D PRINTED PARTS: The ruthex threaded nuts can be retrofitted by heat or ultrasounds into parts of 3D printers from e.g. Anycubic or Prusa. With the help of heat from a soldering iron or ultrasounds, the knurled insert nuts are simply embedded in a blind- or through hole
FIRM HOLDING WITH EASY APPLICATION: The threaded insert nut holds firmly. The knurled nuts have spirals in opposing directions that ensure tightening and loosening torque, as well as a high tightening force. The insertion has been greatly simplified
STABLE & LONG-LASTING THREAD INSERTS: The inserts with internal thread brass, which ensures optimum corrosion resistance and thermal conductivity. This means that each nut can be used for a long time and is easy to use. The reusability of the insert nut is also possible by carefully removing them from the pressure part when they are no longer needed
SUITABLE FOR A VARIETY OF PLASTICS: The inserts are designed for all thermoplastics. For example, the knurled nuts hold in PLA, PETG, ABS, PPS, PP and many more. As soon as the plastic of the part around the brass sleeve cools and hardens, the female threaded sleeve is firmly anchored
PRACTICAL THREAD INSERT SET: The ruthex threaded inserts set are lead free and RX-M2x4 consists of 70 insertable nuts with M2 internal thread and a length of 4 mm. The threaded sleeves can be inserted by ultrasonic and heat embedding

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Our Best Overall Choice

Best Choice

9.7

Mardatt

Mardatt 385Pcs M2 M2.5 M3 M4 M5 Brass Threaded Inserts with Stainless Steel Hex Socket Head Cap Screws Nuts Kit, Brass Heat Set Insert Knurled Nuts & Machine Screws Nuts for 3D Printing Components

Free Shipping

Editor's bottom line:

“This is the best one we tested. In terms of quality, brand and price, we couldn't ask for more.”

Main Highlights

1What You Will Get: You will get 385pcs M2, M2.5, M3, M4, M5 bolt nut and threaded insert set, including 65pcs threaded insert, 105pcs hex socket head cap screws, 105pcs hex nuts, 105pcs flat washers, 5pcs hex wrenches, packed in two plastic boxes for easy carrying and storage. Various sizes to meet your multiple needs.
2304 Stainless Steel & Brass Material: The screws and nuts are made of 304 stainless steel, which has high hardness and tensile strength, superior rust resistance, good oxidation resistance and durability. The heat set insert are made of brass, which has good thermal conductivity, oxidation resistance, and durability. No harmful substances will be released, ensuring that each nut insert can be used for a long time.
3Easy to Use: Our machine screw kits are easy to use, come with matching nuts and flat washers, wrenches, no need to buy additional parts, save effort to use the tool and don't hurt your hands. Brass threaded sleeve inserts can be installed into components of 3D printers by heat or ultrasonic methods, or molded during the injection molding process. Using a common soldering iron, you can easily place them into the holes of a 3D printer.
4Wide Application: The screw threaded insert kit is perfect for home, electronics, automotive. From furniture to electronics, they can easily do the job of 3D printing and laser cutting items. Threaded insert set can be embedded in a wide range of plastics, including PLA, PETG, PPS, PP and other materials. It is widely used in electronics, hardware, lighting, toys, furniture, medical, sports equipment and other industries.
5Precision Craftsmanship: Clear and smooth threads ensure the stability and reliability of the screws and threaded kits, preventing the threads from slipping or hurting your hands during rotation. Knurling significantly enhances the anti-torque and tensile strength of the threaded kits, ensuring a stronger fastening. Recessed nuts feature a guide element that eliminates the need for countersinks or grooves, making your work easier and more efficient.

Show Price

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