螺栓和螺钉通孔（摘自 GB/T5277— 1985）螺纹规格 d通孔 dh系列精 装配中等装配粗 装 配M1M1.2M1.41.11.31.51.21.41.61.31.51.8M1.6M1.8M21.722.21.82.12.422.22.6M2.5M 3M3.52.73.23.72.93.43.93.13.61.2M4M4.5M54.34.85.34.555.54.85.35.8M6M7M86.47.48.46.67.697810M10M12M1410.513151113.515.51214.516.5M161717.518.5M18M20192120222124M22M24M27232528242630262832M30M33M36M39313437403336364235384245M42M45M48434650454852485256M52M56M60545862566266626670M64M68M72667074707478747882M76M80M85788287828691869196M90M95M100939810496101107101107112M105M 110M115109114119112117122117122127M120M125M130124129134127132137132137144M140M150144155147158155165
