【Key Features】 ?【 High-Quality Threaded Inserts Assortment】: Knurled nuts with internal threads are made of high-quality brass, which has optimal thermal conductivity and corrosion resistance, ensuring that each nut insert will last for a long time. ?【Multiple Standard Sizes】: In this kit, you will get 415pcs M2, M3, M4, M5, and M6 female knurled nuts in different lengths, Super large quantities, and various sizes that can meet your needs to install numerous 3D printing accessories. ?【Firm Hold & Easy to Use】: 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. ?【Thickened Storage Case】: This threaded inserts assortment kit comes with a reinforced case, with thickened dividers and latches, keeping all brass nuts well organized, clear labels pasted on the inner and outer lids, and easy to store and at hand when needed. ?【Wide Applications】: These heat set inserts are suitable for various plastics and can be inserted in tapered holes by heating or ultrasonic, as well as by injection molding. 【Specification】 【Product Name】: Threaded Inserts Assortment Kit 【Material】: Brass 【Size】: 17.8 x 10 x 2.54cm 【Specifications】: M2, M3, M4, M5, M6 【Color】: Orange 【Parts List】 40 x M2-3-3.5 Threaded Inserts 40 x M2-4-3.5 Threaded Inserts 40 x M2-6-3.5 Threaded Inserts 40 x M2-8-3.5 Threaded Inserts 40 x M3-4-5 Threaded Inserts 40 x M3-6-5 Threaded Inserts 40 x M3-8-5 Threaded Inserts 40 x M3-10-5 Threaded Inserts 20 x M4-6-6 Threaded Inserts 20 x M4-8-6 Threaded Inserts 20 x M4-10-6 Threaded Inserts 10 x M5-6-7 Threaded Inserts 10 x M5-8-7 Threaded Inserts 10 x M5-10-7 Threaded Inserts 5 x M6-8-8 Threaded Inserts [415-Piece Threaded Inserts Kit] The package includes 415pcs metric threaded inserts for a plastic heat set. The extra large quantity can meet all your needs for joining numerous plastic parts. Each knurled brass insert is available in sizes M2, M3, M4, M5, and M6, to meet specific requirements. [Premium Brass Material] Made of high-quality brass material, the thread-knurled nut has high durability, not easy to break or deform. With a high-temperature resistance of over 300°C/572°F, it is easy to withstand the harsh heat generated during the heat-setting process of plastics. The good thermal conductivity increases overall efficiency and performance in plastic heat setting applications. [Diagonal Thread Knurl Pattern] With a clean surface and diagonal thread knurl pattern, it can be installed seamlessly on the plastic parts without scratching or damaging. The smaller diameter at the front of the insert allows precise insertion into the 3D-printed hole. The thread knurl increases torque resistance and secures the insert tightly to plastic components, extending service life. [Easy to Install] It is easy to install and can be easily heated, also integrated seamlessly into the tapered holes of the plastic part. The fully knurled pattern ensures a match with your plastic components and consistent and efficient performance for your plastic heat setting applications. [Universal Compatibility] These metric thread inserts are compatible with various plastics, including PC, PA, PLA, ABS, PETG, and more. It provides reliable and long-lasting performance on 3D printers, electric molding machines, electric injection molding, automotive plastic enclosures, or laptop molds. This kit will provide convenience and flexibility for you.