340pcs/set assorted stainless steel M3 Hex Nut Bolts Nut for Bolt Socket Set 5/6/8/10/12/14/16/18/20mmFeature:Which provides strength and good corrosion resistance in many environments. The convex head is ideal for use in small areas as fasteners, industrial and construction fasteners. There are many lengths in this set, which can be frequently used in home and office equipment, machinery, furniture, repairs and inventions. Features: Made of 304 stainless steel, 304 stainless steel provides strength and offers good corrosion resistance in many environments. Ideal for use in small areas as fasteners, industrial and construction fasteners. There are many different length flat head screws, which can be used for different purposes. Together 180 pieces of bolts and 160 pieces of nuts for general use will meet your basic daily needs. Widely used in home and office equipment, communication equipment, ship assembly and other machinery. Specification:Material: 304 Stainless SteelPackage Included:M3 x 5mm 20pcsM3 x 6mm 20pcsM3 x 8mm 20pcsM3 x 10mm 20pcsM3 x 12mm 20pcsM3 x 14mm 20pcsM3 x 16mm 20pcsM3 x 18mm 20pcsM3 x 20mm 20pcsM3 nuts 160pcsDue to the quantity determined by weighing precision instruments, please allow about 2% error.