1、Made of high-quality brass, these nuts are strong, durable, heat-resistant, wear-resistant and acid-resistant. 2、These nuts are anti‑rust, anti‑corrosion, non‑toxic, have high hardness, and can be used for a long time. 3、Widely used in mobile phones, notebook computers, various plastic shells, toys, watches, lighting, etc. 4、The thread is deep, complete, neat and clear, and the force is even, not easy to slip, and does not deform. 5、Using sophisticated production technology, the nuts are easy to install, easy to use, and easy to carry. 460 x Knurled Nuts (30 x M4*8-6, 30 x M4*10-6, 20 x M5*6-7, 20 x M5*8-7, 20 x M5*10-7, 30 x M3*6-5, 30 x M3*8, 30 x M3*10-5, 30 x M4*4-6, 30 x M4*6-6, 40 x M2*4-3.5, 40 x M2*6-3.5, 40 x M2*8-3.5, 40 x M2*10-3.5, 30 x M3*4-5) Item Type: Knurled NutsMaterial: BrassNut Type: Knurled NutHeight: 4mm, 6mm, 8mm, 10mmInner Diameter: 2mm, 3mm, 4mm, 5mmOuter Diameter: 3.5mm, 5mm, 6mm, 7mmModel Analysis: M4 x 8-6 (Representing an Inner Diameter of 4mm, a Height of 8mm, and an Outer Diameter of 6mm)