管螺纹直径与螺距对照表

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1、1管螺纹直径与螺距对照表单位:mm圆柱管螺纹圆柱管螺纹圆锥管螺纹GB/T7306.155°密封管螺纹GB/T7306.255°密封管螺纹GB/T730755°非密封管螺纹圆柱内螺纹圆锥内螺纹每25.4mm每25.4mm每25.5mm公称直径内包含的螺距公称直径内包含的螺距公称直径内包含的螺距牙数牙数牙数G1/8280.907RP1/8280.907Rc1/8280.907G1/4191.337RP1/4191.337Rc1/4191.337G3/8191.337RP3/8191.337Rc3/8191.

2、337G1/2141.814RP1/2141.814Rc1/2141.814G3/4141.814RP3/4141.814Rc3/4141.814G1112.309RP1112.309Rc1112.309G11/4112.309RP11/4112.309Rc11/4112.309G11/2112.309RP11/2112.309Rc11/2112.309G2112.309RP2112.309Rc2112.309注：G、RP、PF、PTF均为圆柱（平行）管螺纹,尺寸相同。RC、PT均为圆锥管螺纹，尺寸相同

3、。第1页，共5页2普通螺纹直径与螺距对照表单位:mm螺距P公称直径细牙D、d粗牙4321.51.2510.750.50.3530.50.3540.70.550.80.5610.7581.2510.75101.51.2510.75121.751.51.2511421.51.2511621.51182.521.51202.521.51222.521.5124321.5127321.51303.5321.51333.5321.5364321.5394321.5424.54321.5454.54321.5485

4、4321.55254321.5565.54321.5605.54321.56464321.56864321.5第2页，共5页3管螺纹底孔尺寸表管螺纹底孔直径在图纸无规定时按下表执行单位:mm圆柱内螺纹圆锥内螺纹螺纹规格底孔直径螺纹规格底孔直径G1/8RP1/8PF1/88.6Rc1/8PT1/88.3G1/4RP1/411.5Rc1/411G3/8RP3/815Rc3/814.6G1/2RP1/218.7Rc1/218.2G3/4RP3/424.2Rc3/4PT3/423.6G1RP130.3Rc129

5、.7G11/4RP11/439Rc11/438.2G11/2RP11/245Rc11/244.2G13/4RP251Rc255.8G257注：G、PF、PTF均为圆柱（平行）管螺纹,尺寸相同。RC、PT均为圆锥管螺纹，尺寸相同。第3页，共5页4盲孔螺纹底孔深度表盲孔螺纹底孔深度（h）=图纸规定螺纹深度（h1）+底孔余留深度Δh）图纸未规定时按下表执行单位:mm螺纹公称直径d余留深度螺距PΔh粗牙细牙0.53530.743.50.7564.50.854.51681014161851.258126.51.5

6、1014161820222427303371.75129.521416242730333639454852102.518202212324273639424548566064143.53033164363956606468184.542452154852235.55660256646828第4页，共5页5东芝工件未注公差表≥0.563012031510002000尺寸至630120315100020004000未注公差值±0.1±0.2±0.3±0.5±0.8±1.2±2东芝工件粗糙度对照表第5页，共5

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