常用的螺紋底孔及公差規(guī)定(2).docx

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1、.常用的螺紋底孔及公差規(guī)定常用公制普通螺紋底孔尺寸（JB/GQ0123-80）（單位：mm）公稱粗牙細牙鉆孔直直徑鉆孔直徑螺距鉆孔直徑螺距鉆孔直徑螺距徑M32.6±0.352.7±0.070.05M43.4±3.6±0.070.05//0.54.6±//M54.3-+0.10.050.07M6+0.15+0.155.1-0.050.755.3-0.05M86.8-+00..05157.3-+00..051517.1±0.1M108.6-+00..05159.1-+00..05158.9±0.1M12+0.15+0.151.2510.

2、9±0.11.510.610.3-0.0511.1-0.05+0.15-0.05M1412.1-+00..051513.1-+00..0515M1614.1-+00..101515.1-+00..0515M1815.6-+00..12117.1-+00..0515M2017.6-+00..1219.1-+00..0515M2219.6-+00..1221.1-+00..0515M2421.1-+00..1223.1-+00..0515M3026.6-+00..1329.1-+00..0515M3329.6-+00..1331.6-+

3、00..1232.1-+00..131.5M3634.6-+00..1255°密封圓錐內(nèi)螺紋底孔尺寸（GB/T7306-1987）公稱直徑鉆孔直徑Rc1/16′6.6-+0.10.05Rc1/8′+0.18.6-0.05Rc1/4′11.5-+00..0515Rc3/8′15-+00..0515Rc1/2′18.7-+00..0515Rc3/4′24.2-+0.20.05Rc1′30.3-+00..12Rc11/4′39-+00..12Rc11/2′44.9-+00..12Rc2′56.7-+00..12Rc21/2′72.4-+0

4、0..121/2”-20UNF10.8-+00..12(12.7)12.6±0.1//14.6±0.116.6±0.116.1-+00..121.518.6±0.118.1-+00..1220.6±0.1220.1-+00..1222.6±0.122.1-+00..1228.6±0.128.1-+00..12////234.1±333.1-+00..120.15常用圓柱管螺紋底孔尺寸（JB/GQ0130-80）公稱直徑鉆孔直徑G1/8′8.8±0.1G1/4′11.7+0.2-0.1G3/8′15.2-+00..12G1/2′19

5、-+00..12G5/8′21-+00..12G3/4′24.5-+0.20.1G1′30.7-+00..1525G1/16′6.7//////;.