... )DIN, UNC/UNF,BSW,GB 3)4.8 8.8 10.9 SS201 SS304 SS312 SS316... Model N carriage bolts Surface:z ... ,8.8,10.9.12.9carriage bolts1) Various kinds of bolts available2) Can be made with different tensile strength, such as Class 4 ... .6, 4.8, 5.6, 5.8,6.8, 8.8, 10.9 and 12.9, inperial grade 2 ...