【Premium Brass Material】:Female knurled threaded nuts are made of high quality brass,They have high hardness, heat resistance, wear resistance, rust resistance, corrosion resistance, oxidation and corrosion. It is strong enough to ensure a long service life and can be installed in many different types of materials. 【Excellent workmanship】: Our knurled thread nut has a high precision and deep thread which is compatible with the corresponding screw, avoiding slipping. Smooth surface without any burrs which will not damage other parts. Standard circular, firm and uniform, easy to install. 【Easy to install】: Embedded nuts are suitable for mounting in tapered holes by heating or molding when injection molding. 【Widely Application】: Knurled threaded nuts are widely used in laptop plastic enclosures, 3D printers, automotive, electrical injection molding and all kinds of plastic enclosures. 【Easy to store and carry】: The brass insert nuts have 15 different sizes: M2 M3 M4 M5, brass