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Updated: 18 Apr 2026

10 Best Heat Set Inserts

#1 Best Pick
ShineNow Heat-set Insert Tip for FX888D T18 900M WLC100 SPG40 ST Tips 7 Tip Heads with M2 M2.5 M3 M4 M5 Inserts Kit

ShineNow Heat-set Insert Tip for FX888D T18 900M WLC100 SPG40 ST Tips 7 Tip Heads with M2 M2.5 M3 M4 M5 Inserts Kit

Brand: ShineNow
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  • 【A tip adaptor and heat-set inserts tool kit】—This tool set includes a tip adapter 5 pcs tip heads and 300pcs brass heat-set inserts of M2 M2.5 M3 M4 M5,with this kit it is very easy to attach 3D printing parts to your device.
  • 【Wide compatibility】—This soldering adaptor is for soldering irons that uses T18 900M ST soldering tips such as FX888D FX600 WLC100 SPG40 SP40NUS Aoyue 937 ect
  • 【A wide range of sizes to choose from】—There are 7pcs tip heads of different sizes for heat-set inserts M2 M2.5 M3 M4 M5
  • 【Disigned for 3D Printing Parts】—This tool set is made especially for inserting heat-set inserts of 3D printing parts,each tip head matches the corresponding inserts perfectly,make it very easy to install the insert and more importantly you get a smooth and clean insert.The inserts are tapered at one end,it is very easy for inserting.
  • 【Made of high quality brass】—This tool set is made of high quality brass,it is anti-corrosive and has great heat conduction
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#2 Best Value
Heat Set Insert Tips for M2 M2.5 M3 M4 M5 M6 Inserts, Brass Threaded Insert Embedment Nuts Hydraulic Welded Joint Injection Molding Assortment Kit for 3D Printing

Heat Set Insert Tips for M2 M2.5 M3 M4 M5 M6 Inserts, Brass Threaded Insert Embedment Nuts Hydraulic Welded Joint Injection Molding Assortment Kit for 3D Printing

Brand: Sxhlseller
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  • 3D PRINTER PARTS: 3D printer soldering tips are commonly used for 3D printers to print parts with hot melt copper nuts or to implant nuts on plastic.
  • EASY TO USE: The small distance embedded in the pressed head avoids the plastic parts, so the head is not easily damaged to the plastic parts, and can be inserted into the plastic parts to a certain depth.
  • PRACTICAL CHANGE SYSTEM: Due to the thread in the soldering iron adapter, the soldering tips can be changed very easily WITHOUT completely unscrewing the soldering iron.
  • BRASS MATERIAL: Heat set inserts are made of brass for better thermal conductivity and face to face to prevent nut skewing and facilitate quick insertion of nuts into plastic parts.
  • 936 UNIVERSAL SOLDERING IRON TIPS: Soldering tips are interchangeable with standard 936 general purpose soldering iron tips for use with M2 (M2.5 common), M3, M4, M5, M6 (1/4 inch), M8 and other hot melt nuts or inserts.
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#3 Budget Pick
Vlookee 100PCS M3 Brass Knurled Threaded Insert Nut

Vlookee 100PCS M3 Brass Knurled Threaded Insert Nut

Brand: Vlookee
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  • 【PACKAGE INCLUDES】: Thread Knurled Brass Threaded Heat Set: M3*5.7*4.6(100PCS).
  • 【HIGH QUALITY MATERIAL】:Heat Resistant Insert Embedment Nut is made of high quality brass, hardness of high resistance to rust, wear and corrosion-resistant environmental protection and aesthetic characteristics.
  • 【WORKMANSHIP】: Female Thread Knurled Nuts is no need to counterbore or countersink the boss hole because the insert has guide .
  • 【STRANDARD AND COMPLETE THREAD】Female Thread Knurled Nuts has deep thread, neat and clean, not easy to strip during rotation, stable and reliable. Convenient operation, good texture, greatly improve your work efficiency.
  • 【Multifunctional】:These heatset inserts can be widely used on the injection moulding for tightly fixing. Can be installed by ultrasonic or heat into thread tapered hole, or molded in during injection. Also apply to circuit board assembly and in the field of electronics. Using a normal soldering iron, you could easily set them into 3D printed holes.
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#4 Top Choice
Threaded Inserts M2 + M3 + M4 + M5 + M6 Assortment Box - Brass Heat Set Insert for Plastic Parts - Metric Knurled Nuts - Insert by Heat into 3D Printing Components nut Inserts(300pcs)

Threaded Inserts M2 + M3 + M4 + M5 + M6 Assortment Box - Brass Heat Set Insert for Plastic Parts - Metric Knurled Nuts - Insert by Heat into 3D Printing Components nut Inserts(300pcs)

Brand: Mydronix
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  • Premium Quality: Made of high-quality brass material, these threaded inserts are corrosion-resistant, durable, and strong.
  • The brass threaded insert can be installed into the part of the 3d printer by heating or ultrasonic. Due to the geometry of the threaded sleeve, it holds firmly in the pressure part. The opposing spiral knurled nut ensures a high balance of tightening and loosening torque. Through the guide, insertion has been greatly simplified.
  • Easy to Install: These M2 M3 M4 M5 M6 threaded inserts can be installed into a 3D printer part by heating or ultrasonic welding.
  • Widely used: These threaded inserts are widely used in various applications, such as 3D printing, plastic molding, and furniture manufacturing. Suitable for types of plastics, such as ABS, PETG, and more.
  • These versatile metric threaded inserts are compatible with various plastics, including PC, PA, PLA, ABS, PETG, and more. Whether you are installing them on 3D printers, electrical molding machines, electrical injection molding, automotive plastic shells, or laptop molds, these inserts will provide a reliable and long-lasting solution.
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#5 Popular Choice
Soldering Irons Heat Set Tip for TS100/101 with M2 M2.5 M3 M4 M5 M6 M7 M8 Heat Set Insert Tips

Soldering Irons Heat Set Tip for TS100/101 with M2 M2.5 M3 M4 M5 M6 M7 M8 Heat Set Insert Tips

Brand: Zopsc
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  • Compatibility: Suitable for TS100/101 soldering iron tip, interchangeable with standard 936 common iron tip. Suitable for M2 (compatible with M2.5), M3, M4, M5, M6 (1/4in), and hot melt nuts or inserts like M8 commonly used on 3D printers.
  • Material: The male head and female head are made of brass material, TS100 soldering iron tip is machined with TS100‑C4 iron core for optimal performance.
  • Easy to Replace: Designed with hand tightened knurling joints, the main joint can be disassembled and replaced with different types of threaded pressure heads in a cooling state.
  • Excellent Heat Conduction: Brass material with good heat conduction, ensures direct with the end face to prevent nut tilt, facilitating quick melting into plastic parts.
  • Precise Embedding: Our insert has a smaller embedding distance compared to other similar heads, preventing plastic part deformation after embedding. The head is not easily damaged and can be inserted into the plastic part to a certain depth.
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#6 Top Pick
60W Digital Soldering Iron Heat Set Insert Tool with Heat Set Insert Tips and 100 Pcs M3x4x4.2 Threaded Inserts

60W Digital Soldering Iron Heat Set Insert Tool with Heat Set Insert Tips and 100 Pcs M3x4x4.2 Threaded Inserts

Brand: 3DZWMAN
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  • The digital soldering iron supports automatic voltage conversion of 110V/240V. Long press the # switch, with a temperature range of 180 ℃ (356 ℉) -500 ℃ (932 ℉). Long press the+- button to continuously adjust the temperature, and comes with a soldering iron tip and silicone protective cover
  • The set includes high-quality brass nuts, 100PCS threaded inserts M3xL4xD4.2
  • Insert Tips M2 M2.5 M3 M4 M5 M6 (1/4) M8 can match the electric soldering iron of ceramic tube D4xL24 on the market
  • The kit can be used for 3D printing inserts and general plastic inserts,such as PC, PA, PLA, ABS, PETG
  • Material temperature recommendations PLA:180℃-220℃ 356F-428F PETG:210℃-230℃ 410F-446F ABS:230℃-250℃ 446F-482F Nylon/PC: 280℃-350℃ 536F-662F
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#7 Top Pick
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

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

Brand: 3DZWMAN
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  • TEMPERATURE RANGE: Adjustable temperature control from 180°C to 500°C, perfect for precise heat setting of threaded inserts
  • VERSATILE DESIGN: Includes multiple heat set tips from M2 to M8, compatible with various brass metric knurled nuts for 3D printing
  • INSERTION HEIGHT: Features 210mm vertical insertion height capacity, providing ample space for various component sizes
  • SPECIFICATIONS: 60-watt power consumption, 220V operation, with a generous 150cm cable length for flexible positioning
  • CONSTRUCTION: Durable metal construction weighing 850 grams, with compact dimensions of 15cm x 12cm x 21cm
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#8 Top Pick
300 Pcs Brass Threaded Inserts Assortment - M2 M3 M4 M5 M6 Metric Knurled Nuts for Plastic & 3D Printing - Heat Set Insert Kit with Hex Head

300 Pcs Brass Threaded Inserts Assortment - M2 M3 M4 M5 M6 Metric Knurled Nuts for Plastic & 3D Printing - Heat Set Insert Kit with Hex Head

Brand: OzGrove
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  • PREMIUM BRASS CONSTRUCTION: Crafted from high-quality brass, these threaded inserts offer superior durability and excellent heat resistance, making them ideal for heat-setting processes into plastic components. The natural corrosion resistance of brass ensures a long service life, while the knurled exterior provides enhanced grip for a secure hold within your projects
  • COMPREHENSIVE ASSORTMENT KIT: This practical set includes 300 pieces of metric threaded inserts in various sizes (M2, M2.5, M3, M4, M5, M6) to cater to diverse fastening needs. The organised assortment ensures you have the right insert on hand for everything from delicate 3D printed prototypes to more substantial plastic fabrications
  • EFFORTLESS INSTALLATION & SECURE HOLD: Designed for simple installation using a standard soldering iron or specialised heating tool, these heat-set inserts simplify the process of creating strong, wear-resistant threads in plastic. The hexagonal head design allows for easier handling during installation, and the knurling prevents rotation once embedded
  • VERSATILE APPLICATION: Ideal for enthusiasts and professionals working with 3D printers, injection moulding, and various plastic components. Commonly used in drone building, RC models, furniture assembly, automotive plastic shells, and electronic enclosures. Provides a reliable metal threading solution for materials like PLA, ABS, PETG, PC, and Nylon
  • CONVENIENT STORAGE & ORGANISATION: The inserts come in a sturdy compartmentalised box with clear labelling. This keeps different sizes separate and easily identifiable, saving valuable time during your workflow and protecting your investment by preventing loss or damage
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#9 Top Pick
Heat-Set Insert Tips, 1/4 Inch Universal 936 Soldering Iron Tips, M2 M2.5 M3 M4 M5 M6 M8 Soldering Iron Heat Set Insert Tool for 3D Printer Accessories

Heat-Set Insert Tips, 1/4 Inch Universal 936 Soldering Iron Tips, M2 M2.5 M3 M4 M5 M6 M8 Soldering Iron Heat Set Insert Tool for 3D Printer Accessories

Brand: Zopsc
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  • 936 UNIVERSAL SOLDERING IRON TIPS: Soldering tips are interchangeable with standard 936 general purpose soldering iron tips for use with M2 (M2.5 common), M3, M4, M5, M6 (1/4 inch), M8 and other hot melt nuts or inserts.
  • PRACTICAL CHANGE SYSTEM: Due to the thread in the soldering iron adapter, the soldering tips can be changed very easily WITHOUT completely unscrewing the soldering iron.
  • BRASS MATERIAL: Heat set inserts are made of brass for better thermal conductivity and face to face to prevent nut skewing and facilitate quick insertion of nuts into plastic parts.
  • EASY TO USE: The small distance embedded in the pressed head avoids the plastic parts, so the head is not easily damaged to the plastic parts, and can be inserted into the plastic parts to a certain depth.
  • 3D PRINTER PARTS: 3D printer soldering tips are commonly used for 3D printers to print parts with hot melt copper nuts or to implant nuts on plastic.
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#10 Top Pick
FullFun M2 M3 M4 M5 M6 (300pcs) Brass Threaded Inserts, Heat Set Insert, Metric Female Knurled Embedment Nuts for Plastic and 3D Printing Injection Molding Assortment Kit

FullFun M2 M3 M4 M5 M6 (300pcs) Brass Threaded Inserts, Heat Set Insert, Metric Female Knurled Embedment Nuts for Plastic and 3D Printing Injection Molding Assortment Kit

Brand: FullFun
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  • PACKAGE CONTENT: You will get 300pcs M2 M3 M4 M5 M6 3D printing threaded inserts 5 sizes, super large quantity can meet your needs of connecting numerous 3D printing accessories. Please ensure that the size of the brass threaded inserts can well match your 3D printer
  • BRASS THREADED INSERTS: The heat-set threaded inserts for 3D printing are made of quality brass, extremely sturdy, not easy to break or deform, also can withstand high temperatures above 300°C / 572°F. Excellent thermal conductivity also makes your 3D printer work more effectively
  • EASY TO USE: The knurled threaded inserts can be easily installed into the tapered holes of 3D printers by heating and also can be molded by injection molding. The 3D printing brass nuts with full knurled patterns can perfectly match your 3D printers. Practical nuts make your 3D printer work well
  • TWILL THREAD KNURLED NUT: With a clean surface and twill thread knurled patterns, the threaded inserts can be installed onto 3D printers and fit perfectly, and won't scratch your precious 3D printing parts. The smaller diameter of the front end of the threaded inserts nuts allows you to insert them into a 3D printing hole precisely. Inclined thread knurls increase the torque resistance, so they can be fixed on the 3D printers tightly
  • WIDE APPLICATIONS: These heat-set threaded inserts can be inserted into various plastics, such as PC, PA, PLA, ABS, PETG, etc. Suitable for installing on 3D printers, electrical molding machines, electrical injection molding, automotive or laptop molding plastic shells, etc
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