1. Made of brass, it has super rust resistance and excellent oxidation, ensuring long-term use 2. Comply with the standard index system. The average error is less than 0.01mm. The screw threads are very , clean and accurate, and do not require any pain. Accurate size makes installation or repair easier 3. Widely used in laptop plastic shells, desktop computer plastic shells, GPS plastic shells, router plastic shells, mobile phone plastic shells, unlimited communication facilities plastic shells, household appliance plastic shells, automobiles, medical, electronics and other plastic shells Product name: Brass female thread knurled nut Package include: 40pcs = M2 x 4mm x 3.5mm 40pcs = M2 x 6mm x 3.5mm 40pcs = M2 x 8mm x 3.5mm 40pcs = M2 x 10mm x 3.5mm 30pcs = M3 x 4mm x 5mm 30pcs = M3 x 6mm x 5mm 25pcs = M3 x 8mm x 5mm 25pcs = M3 x 10mm x 5mm 20pcs = x 4mm x 6mm 20pcs = x 6mm x 6mm 15pcs = x 8mm x 6mm 15pcs = x 10mm x 6mm 10pcs = M5 x 6mm x 7mm 10pcs = M5 x 8mm x 7mm 10pcs = M5 x 10mm x 7mm Colour:Gold Material:Brass Package Contents: 370 x threads Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.