1.Finish: plain, zinc, blank and HDG 2.Thread: MM, UNC, UNF and BSW 3.Grades: 4.8, ... , 9.8, 10.9 and 12.9 Carriage bolts DIN6031)Various kinds of bolts available2)Material:carbon steel, stailess steel3)Diameter: 5 ... .8, 8.8, 10.9 and 12.9, inperial grade 2, 5, 8 and 106)Can be supplied with different finish ...