300pcs M3 Black 10.9 Grade Button Head Socket Hex Socket Nut Set Features: This is an M3 head set of bolts and nuts with 10.9 grade high strength. It is perfect for indoor use, as a component of fastening, industrial fasteners and construction sites. There are many different lengths of screw that can be used for different purposes. A total of 300 pieces of general purpose bolts and nuts will meet your daily basic needs. Widely used in home and office appliances, communications equipment, ship assembly and other machinery industry. Specification: Type: Button Head Hex Socket Strength: 10.9 Grade Color: Black Size & Quantity: M3*5 20pcs M3*6 20pcs M3*8 20pcs M3*10 20pcs M3*12 20pcs M3*14 20pcs M3*16 20pcs M3*18 20pcs M3*20 20pcs M3 nut 120pcs Weight: 200g / 7.1oz (approx.). Packaging List:1 Box*Bolts & Nuts