 | UDC 621.882.6 | GB 12-88
代替 GB12-76 | | 半圓頭方頸螺栓 | | Cup head square neck bolts |
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 | UDC 621.882.6 | GB 15-88
代替 GB15-76 | | 大半圓頭帶榫螺栓 | | Cup head nib bolts with large head |
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 | UDC 621.882.6 | GB 31.2-88
代替 GB31、23、24-76 | | 六角頭螺桿帶孔螺栓 細桿 B級 | | Hexagon bolts with split pin hole on shank-Reduced shank-product grade B |
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 | UDC 621.882.6 | GB 32.3-88
代替 GB32、25、26-76 | | 六角頭頭部帶孔螺栓 細牙 A 和 B 級 | | Hexagon bolts with wire holes on head-Fine pitch thread-product grade A and B |
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