Bolts Standard:DIN,ASIN,BS,GB Material:Carbon steel Diameter:5mm～20mm,1/4″～3/4″ Length:8mm~200mm,5/16″~8″ Thread:MM,UNC,UNF,BSW Grade:4.8,5.8,6.8,8.8,9.8,10.9,12.9 Finish:Plain, Zinc, Blank, Nickel, Chrome, H.D.G. Packing:Carton,Box,Bag,Pallet Standard: DIN ANSI BS GB Material: Carbon steel or specified Diameter: 5mm~20mm,1/4″~3/4″ Length: 8mm~200mm,5/16″~8″ Thread: Metric, Coarse, Fine, Fractional 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