Check the listing for details. 350Pcs Threaded Inserts M2 M2.5 M3 M4 M5 M6 Female Thread rolled Metric Brass. Color: Brass, Condition: New, Made in United States. Listed at 17.52 USD. Feature:【Multiple Standard Sizes】: In this kit, you will get 350pcs M2 M2.5 M3 M4 M5 M6 female knurled nuts in different lengths, total 18 sizes. Super large quantity and various sizes can meet your needs to install numerous 3D printing accessories.【High Quality Threaded Inserts Assortment】: Knurled nuts with internal threads are made of high quality brass, which has the optimal thermal conductivity and corrosion resistance, ensuring that each nut inserts will last for a long time.【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 o.