JG/T 5057.1-1995
Construction machinery and equipment high strength hex head bolts
JG/T 5057.2-1995
Construction machinery and equipment high strength hex head bolts-full thread
JG/T 5057.3-1995
Construction machinery and equipment high strength hex head bolts-reduced shank
JG/T 5057.5-1995
Construction machinery and equipment high strength hex head bolts-fine thread
JG/T 5057.4-1995
Construction machinery and equipment high strength hex head bolts with large hex head
JG/T 5057.6-1995
Construction machinery and equipment high strength hex head bolts-Full fine thread