|Machine Screws|Combination Screws Standard: DIN ANSI BS GB Material: carbon steel, copper, stainless steel or specified Diameter: 1.5mm~12mm,1/6″~1/2″ Length: 3mm~150mm,1/8″~6″ Thread: metric,coarse thread,fine thread,imperial Mechanical properties: 4.8, 5.8, 6.8, 8.8, 9.8, 10.9, 12.9 Finish: natural, galvanized, blackened, nickel-plated, chrome-plated, hot-dip galvanized