carriage bolt Surface: zinc plated, black, hot dip, dacromet Size:M6-M8*20mm-400mm Grade:4.8,8.8,10.9,12.9 carriage bolt1) Various kinds of bolts available2) Material: Carbon Steel3) Grade:4.6, 4.8, 5.6, 5.8, 6.8, 8.8, 10.9 and 12.9, inperial grade 2, 5, 8 and 104) Finish: Plain, zinc plated, hot-dip galvanized, mechanical plating, black,Nickel5)Standard: DIN603 ANSI ISO8677 BS GB6)Diameter:5MM- ...