 | UDC 621.882.6 | GB 12-88 |
代替 GB12-76 | | 半圆头方颈螺栓 | | Cup head square neck bolts |
|
 | UDC 621.882.6 | GB 15-88 |
代替 GB15-76 | | 大半圆头带榫螺栓 | | Cup head nib bolts with large head |
|
 | UDC 621.882.6 | GB 31.2-88 |
代替 GB31、23、24-76 | | 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 |
|
 | UDC 621.882.6 | GB 32.3-88 |
代替 GB32、25、26-76 | | 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 |
|
