1 GB/T 2-1985 紧固件 外螺纹零件的末端 Fasteners--Ends of parts with external thread
2 GB/T 8-1988 方头螺栓 C级 Square head bolts--Product grade C
3 GB/T 10-1988 沉头方颈螺栓 Flat countersunk square neck bolts
4 GB/T 11-1988 沉头带榫螺栓 Flat countersunk nib bolts
5 GB/T 12-1988 半圆头方颈螺栓 Cup head square neck bolts
6 GB/T 13-1988 半圆头带榫螺栓 Cup head nib bolts
7 GB/T 15-1988 大半圆头带榫螺栓 Cup head nib bolts with large head
8 GB/T 22-1976 小六角头导颈螺栓 Bolts, small hexagon head with fit neck
9 GB/T 23-1976 小六角头螺杆带孔螺栓 Bolts, small hexagon head with hole through the shank
10 GB/T 24-1976 小六角头螺杆带孔导颈螺栓 Bolts, small hexagon head with fit neck and hole through the shank
11 GB/T 25-1976 小六角头头部带孔螺栓 Bolts, small hexagon head with holes through the head
12 GB/T 26-1976 小六角头头部带孔导颈螺栓 Bolts, small hexagon head with fit neck and holes through the head
13 GB/T 27-1988 六角头铰制孔用螺栓 A和B级 Hexagon fit bolts--Product grade A and B
14 GB/T 28-1988 六角头螺杆带孔铰制孔用螺栓 A和B级 Hexagon fit bolts with Split pin hole on shank--Product grade A and B
15 GB/T 29.1-1988 六角头头部带槽螺栓 A和B级 Hexagon bolts with slot on head--Product grade A and B
16 GB/T 29.2-1988 十字槽凹穴六角头螺栓 Cross recessed hexagon bolts with indentation
17 GB/T 31.1-1988 六角头螺杆带孔螺栓 A和B级 Hexagon bolts with split pin hole on shank--Product grade A and B
18 GB/T 31.2-1988 六角头螺杆带孔螺栓 细杆 B级 Hexagon bolts with split pin hole on shank--Reduced shank--Product grade B
19 GB/T 31.3-1988 六角头螺杆带孔螺栓 细牙 A和B级 Hexagon bolts with split pin hole on shank--Fine pitch thread--Product grade A and B
20 GB/T 32.1-1988 六角头头部带孔螺栓 A和B级 Hexagon bolts with wire holes on head--Product grade A and B 21 GB/T 32.2-1988 六角头头部带孔螺栓 细杆 B级 Hexagon bolts with wire holes on head--Reduced shank--Product grade B
22 GB/T 32.3-1988 六角头头部带孔螺栓 细牙 A和B级 Hexagon bolts with wire holes on head--Fine pitch thread--Product grade A and B