GB code name thread standard specifications
GB/T5780-2000 47.60 first half Thread M5-64
GB/T5781-2000 47.60 first full Thread M5-64
GB/T5782-2000 47.60 first half Thread (8.8, 10.9, 12.9) M3-M64
GB/T5783-2000 47.60 first full-Thread (8.8, 10.9, 12.9) M3-M64
GB/T5784-2000 hexagonal head thin rod bolt M5-M20
GB/T5785-2000 47.60 Tau Fine Thread M8 * 1-M64 * 4
GB/T5786-2000 47.60 first full thread Fine Thread M8 * 1-M64 * 4
GB/T5789-1986 47.60 flange bolts increase of M5-M20 Series
GB/T29.1-1988 47.60 grooved first head bolts M3-M12
GB/T29.2-1988 Cross trough Aojue 47.60 stud M4-M8
GB/T12-1988 the first half, neck bolts M6-M20
GB/T14-1998 ended most of the neck bolts M5-M20
GB/T3632-1995 shear-twisting steel structure with high strength bolts to the Deputy M16-M24
GB/T1228-1991 High Strength Steel hexagonal head bolt M12-M30
GB/T1229-1991 High Strength Steel hexagonal head nut M12-M30
GB/T1230-1991 High Strength Steel washers & 12 - & 30