 | UDC 621.882.6 | GB 13-88
代替 GB13-76 | | 半圆头带榫螺栓 | | Cup head nid bolts |
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 | ISO 8677:1986 | GB 14-1998
代替 GB14-88 | | 大半圆头方颈螺栓 C级 | | Cup head square neck bolts with large head-Product grade C |
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 | 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 |
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 | UDC 621.882.6 | GB 27-88
代替 GB27-76 | | 六角头铰制孔用螺栓 | | Hexagon fit bolts-product grade A and B |
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