JG/T 5057.7-1995
Construction machinery and equipment high strength bolts with hexagon flange—Type A
JG/T 5057.7-1995
Construction machinery and equipment high strength bolts with hexagon flange—Type B
JG/T 5057.8-1995
Construction machinery and equipment high strength bolts with hexagon flange-reduced shank—Type A
JG/T 5057.8-1995
Construction machinery and equipment high strength bolts with hexagon flange-reduced shank—Type B