DIN931/933 HEX BOLT 1.Material:Carbon Steel, SS 2.Surface:z.p,black,hot dip,etc 3.Size:6-8*20-400 4.Grade:4.8,8.8,10.9.1 DIN931/933 HEX BOLT1) Various kinds of nuts 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, 5, 8 and 103) Can be supplied with different finish, such as bright, zinc plated, hot-dip galvanized ...