Best Plastic Threaded Inserts in 2026

Type of Product: Brass Threaded Insert Embedded Nuts Assortment Kit.

Product Material: Made of premium brass, which has high hardness, no deformation, durable and reliable for long time use.

Package Detail: In this set, it include 10 kinds of m2, m2.5, m3 knurl thread inserts nuts total 500pcs which are well packed in a plastic box.

Good quality materials:Metric thread,made of high quality zinc alloy, hardness of high resistance to rust, wear and corrosion-resistant environmental protection and aesthetic characteristics

Package include: 12 sizes include M4*10, M5*10,M6*8, M6*10,M6*12, M6*15, M6*18, M6*20, M6*25,M8*15 M8*20, M10*25, total 265 pieces in a transparent box with can meet your different needs

Usage and install: pre-drill a proper hole, screw in with internal hex tool; Unique self-tapping designed external thread, contribute to tapping, with good tensile resistance, install with hex key, tapered external threads makes it not easy to pull out caused by vibration

【7 Size Assorted Wire Screw Sleeve Set】The kit contains 7 kinds of size: M3（20pcs, M4(15pcs), M5(15pcs), M6(10pcs), M8(8pcs), M10(8pcs), M12(8pcs). Totally 84 piece. Package into a plastic grids case and each size sorted a grid separately.

【304 Stainless Steel】Made of 304 stainless steel, hardness, rust-resistance and anti-corrosion. Not easy to slick, deep thread, no deformation, smooth thread, high precision. High hardness and low abrasion.

【Strong Connection 】With certain elastic and even load so that it is resistant to vibration. locking-design allows it lock the the screw into the threaded hole,avoiding sliding wire. Greatly improve strength and stability of screws connection.

♛【What You Get】: In this set, it include 7 size of M3x30pcs, M4x30pcs, M5x20pcs, M6x20pcs, M8x20pcs, M10x10pcs, M12x10pcs total 140pcs wire screw sleeve which are well packed in a plastic box.

♛【High Quality】: Made of 304 stainless steel, which offers good corrosion resistance, they also have superior rust resistance and the excellent of oxidation resistance. High hardness for long time service.

♛【Coiled Wire Type】: Deep thread, not easy to slick, with a certain of elastic, can make the load on the thread is more even, eliminate the screw and screw hole deviation between the pitch and tooth type, and can absorb vibration, thus increasing the screw thread connection strength and resistance to fatigue strength.

THREADED INSERTS FOR METAL – E-Z LOK Thread Inserts for metal. Solid threaded inserts that are strong, easy to install, and self-locking. For optimal holding power in metal.

INSTALL WITH STANDARD TOOLS – 303 stainless steel threaded inserts machined out of solid steel for strength. Install with standard tools. No special drills, taps, or special installation tools are needed.

QUICKLY REPAIR DAMAGED THREADS – Quickly repair damaged threads or reinforce tapped holes in soft metals with these steel thread inserts.

THREADED INSERTS FOR METAL – E-Z LOK Threaded Insert Assortment Kit for metal. Threaded inserts for putting strong, machine threads in metal.

QUICKLY REPAIR DAMAGED THREADS – Quickly repair damaged threads or reinforce tapped holes in metals with this thread repair kit.

AVAILABLE OPTIONS – Kit is available in carbon steel threaded inserts and stainless steel threaded inserts that are easy to install with standard tools.

♛【What You Get】: In this set, it include 7 size of M3x20pcs, M4x15pcs, M5x15pcs, M6x10pcs, M8x8pcs, M10x8pcs, M12x8pcs total 84pcs wire screw sleeve which are well packed in a plastic box.

♛【High Quality】: Made of 304 stainless steel, which offers good corrosion resistance, they also have superior rust resistance and the excellent of oxidation resistance. High hardness for long time service.

♛【Coiled Wire Type】: Deep thread, not easy to slick, with a certain of elastic, can make the load on the thread is more even, eliminate the screw and screw hole deviation between the pitch and tooth type, and can absorb vibration, thus increasing the screw thread connection strength and resistance to fatigue strength.

【Designed for Injection Molding】: With deep & clear knurls, the threaded inserts will add enough strength to screw connections when inserted into plastic components. The softened plastic will flow into the knurl pattern and then harden to form a firm bond with the insert.

【High-quality Material】: Made of premium brass material, our threaded insert for plastic has both aesthetics and high strength, which can be used for a long time. And the high thermal conductivity of brass thread inserts means faster heating and insertion into plastic parts.

【How to Use】: Female thread knurled insert nuts are suitable for mounting into tapered holes by heating or for molding during injection molding. You can use a soldering iron to heat it up and then pressing it into the hole. It is easy to control and at a low cost.

THREADED INSERTS FOR PLASTIC – E-Z Sonic ultrasonic thread inserts for plastic are designed for post-molding installation in thermoplastic materials.

EASY INSTALLATION – Install these metal threaded inserts ultrasonically or with a heat driver. The tapered design simplifies installation.

FOR USE WITH APPLICATIONS – The threaded inserts for plastic are designed for putting standard machine threads in 3D printed and thermoplastic parts.

√ Quantity: VIGRUE this nuts kit includes 340pcs of M2 M2.5 M3 M4 M5 M6 Thread Knurled Nuts, and it includes 12 various common sizes knurled nuts, sufficient for daily application.

√ Great Performance: Thanks to the outside oblique threads, it holds firmly in the pressure part and ensuring a high balanced tightening, once heated plastic around the brass sleeve nuts cools and hardens, the threaded nuts are firmly anchored

√ Organized Box: The nuts come in a portable clear box with corresponding sizes label. It is convenient for you to put away and store, which allow you to get the one you need quickly, improving your project efficiently.

THREADED INSERTS FOR METAL – E-Z LOK Thread Inserts for metal. Solid threaded inserts that are strong, easy to install, and self-locking. For optimal holding power in metal.

INSTALL WITH STANDARD TOOLS – C12L14 Carbon steel threaded inserts. Install with standard tools. No special drills, taps, or special installation tools are needed.

QUICKLY REPAIR DAMAGED THREADS – Quickly repair damaged threads or reinforce tapped holes in soft metals with these steel thread inserts.

High Quality: Thread repair inserts has deep thread, not loose, high-precision, strong anti-seismic, anti-impact and anti-abrasion functions, it can greatly improve the life of thread

Material: Wire thread inserts all made of 304 stainless steel, has good corrosion resistance, also has superior rust resistance and the excellent of oxidation resistance, avoid the damage of thread

Size: In thread repair kits, it include 7 size of M3 M4 M5 M6 M8 M10 M12 threaded inserts packed in a plastic box, each size sorted a grid separately.

M2 + M3 + M4 + M5 THREAD INSERTS FOR YOUR 3D PRINTED PARTS: The ruthex threaded nuts can be retrofitted by heat or ultrasound into parts of 3D printers from e.g. Anycubic, Creality or Prusa. With the help of heat from a soldering iron or ultrasound, the insert nuts are simply embedded in a blind or through hole

FIRM HOLDING WITH EASY APPLICATION: Thanks to the geometry of the threaded sleeve, it holds firmly in the pressure part. The opposing spiral-shaped knurled nuts ensure a high balanced tightening and loosening torque, as well as a high tightening force. Through the guide, 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 insert 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

M3 THREAD INSERTS FOR YOUR 3D PRINTED PARTS: The ruthex threaded nuts can be retrofitted by heat or ultrasound into parts of 3D printers from e.g. Anycubic or Prusa. With the help of heat from a soldering iron or ultrasonic, the insert nuts are simply embedded in a blind- or through hole

FIXED HOLD WITH EASY APPLICATION: Thanks to the geometry of the threaded sleeve, the threaded sleeve holds it firmly in the pressure part. The opposing spiral-shaped knurled nuts ensure a balanced high tightening and loosening torque, as well as a high tightening force. The guide has made insertion much easier

STABLE & LONG-LASTING THREAD INSERTS: The inserts with internal thread brass, which ensures optimum corrosion resistance and thermal conductivity. This means that each insert 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