carriage bolt 1-STANDARD:DIN,ANSI,IFI,BS,GB 2-MATERIAL: stainless steel 201, 304,carbon steel 3-THREAD:MM,UNC,UNF,BSW,coarse& carriage bolt1-STANDARD:DIN,ANSI,IFI,BS,GB2-MATERIAL: stainless steel 201, 304,carbon steel3-THREAD:MM,UNC,UNF,BSW,coarse&fine thread CARRIAGE BOLT din603