螺纹底孔尺寸对照表

螺纹孔底孔尺寸表

中国（旧）中国（新）日本中国（旧）中国（新）M5×0.84.2M8×17.0M12×1.510.5M20×218.0ZG1/8″Rc1/8″PT1/8″8.4G1/8″8.6Z1/8″NPT1/8″8.4M6×15.0M10×19.0M14×1.512.5M22×220.0ZG1/4″Rc1/4″PT1/4″11.0G1/4″11.7Z1/4″NPT1/4″11.1M8×1.256.8M12×111.0M16×1.514.5M24×222.0ZG3/8″Rc3/8″PT3/8″14.5G3/8″15.2Z3/8″NPT3/8″14.6M10×1.58.5M14×113.0M18×1.516.5M27×225.0ZG1/2″Rc1/2″PT1/2″18.0G1/2″18.8Z1/2″NPT1/2″18.1M12×1.7510.2M16×115.0M20×1.518.5M30×228.0ZG3/4″Rc3/4″PT3/4″23.5G3/4″24.3Z3/4″NPT3/4″23.5M14×212.0M18×117.0M22×1.520.5M33×231.0ZG1″Rc1″PT1″29.5G1″30.5Z1″NPT1″29.4M16×214.0M20×119.0M24×1.522.5M36×234.0ZG1 1/4″Rc1 1/4″PT1 1/4″38.0G1 1/8″35.2Z1 1/4″NPT1 1/4″38.2M18×2.515.5M22×121.0M27×1.525.5M42×240.0ZG1 1/2″Rc1 1/2″PT1 1/2″44.0G1 1/4″39.2Z1 1/2″NPT1 1/2″44.3M20×2.517.5M24×123.0M30×1.528.5M48×246.0ZG2″Rc2″PT2″56.0G1 1/2″45.1Z2″NPT2″56.3M24×321.0M27×126.0M33×1.531.5M52×250.0ZG2 1/2″Rc2 1/2″PT2 1/2″72.0G1 3/4″51M27×324.0M30×129.0M36×1.534.5ZG3″Rc3″PT3″84.0G2″56.9M30×3.526.5M42×1.540.5M30×327.0G1 1/4″62.95M33×3.529.5M48×1.546.5M33×330.0G2 1/2″72.45M36×432.0M36×333.0G2 3/4″78.8M42×4.537.5M42×339.0G3″85.2M48×543.0M48×345.0M52×547.0M52×349.0M56×5.550.5M64×658.0公称尺寸底孔d布锥管螺孔攻丝前钻孔尺寸底孔d公称尺寸底孔d底孔d攻丝前钻孔尺寸公称尺寸攻丝前钻孔尺寸底孔d圆锥管螺孔圆柱管螺孔普通粗牙螺孔攻丝前钻孔尺寸攻丝前钻孔尺寸公称尺寸底孔d公称尺寸普通细牙螺孔公称尺寸底孔d公称尺寸

1 螺纹底孔对照表-螺纹护套规格和螺纹护套底孔尺寸

符号说明：

d--螺纹护套公称直径（螺钉公称直径） L—螺纹护套公称长度（安装后的螺纹长度） P--螺距

do--钻丝套安装用钻头直径 Dz--螺纹护套自由状态下外径 N--螺纹护套自由状态下圈数

螺纹护套规格参数表

螺纹护套规格参数

螺纹规格d×p k×d 螺纹护套安装后长度L(mm) 钻头直径do(mm) 螺纹护套自由状态下外径Dz(mm) 自由状态螺套圈数N(≈)

2×0.4 1d

1.5d

2d 2

3

4 2 2.6-2.8 2.9

4.7

6.5

2.5×0.45 1d

1.5d

2d 2.5

3.75

5 2.6 3.3-3.5 3.5

5.9

8.1

3×0.5 1d

1.5d

2d 3

4.5

6 3.1 3.8-4.0 4

6.3

8.7

4×0.7 1d

1.5d

2d 4

6

8 4.1 5.15-5.35 3.7

6

8.4

5×0.8 1d

1.5d

2d 5

7.5

10 5.2 6.35-6.6 4.3

6.9

9.7

6×1 1d

1.5d

2d 6

9

12 6.2 7.6-7.85 4.2

7

9.6

7×1 1d

1.5d

2d 7

10.5

14 7.2 8.65-8.9 5.4

8.5

11.6

8×1 1d

1.5d

2d 8

12

16 8.2 9.85-10.1 6.1

9.5

13

8×1.25 1d

1.5d

2d 8

12

16 8.3 9.85-10.1 4.7

7.4

10.6

10×1 1d

1.5d 10

15 10.2 12.1-12.5 7.6

12 2 2d 20 16.3

10×1.5 1d

1.5d

2d 10

15

20 10.3 12.1-12.5 5

8

11.2

12×1.5 1d

1.5d

2d 12

18

24 12.4 14.4-14.8 6.2

中国(旧)中国(新)日本中国(旧)中国(新)M5×0.84.2M8×17.0M12×1.510.5M20×218.0ZG1/8″Rc1/8″PT1/8″8.4G1/8″8.6Z1/8″NPT1/8″8.4M6×15.0M10×19.0M14×1.512.5M22×220.0ZG1/4″Rc1/4″PT1/4″11.0G1/4″11.7Z1/4″NPT1/4″11.1M8×1.256.8M12×111.0M16×1.514.5M24×222.0ZG3/8″Rc3/8″PT3/8″14.5G3/8″15.2Z3/8″NPT3/8″14.6M10×1.58.5M14×113.0M18×1.516.5M27×225.0ZG1/2″Rc1/2″PT1/2″18.0G1/2″18.8Z1/2″NPT1/2″18.1M12×1.7510.2M16×115.0M20×1.518.5M30×228.0ZG3/4″Rc3/4″PT3/4″23.5G3/4″24.3Z3/4″NPT3/4″23.5M14×212.0M18×117.0M22×1.520.5M33×231.0ZG1″Rc1″PT1″29.5G1″30.5Z1″NPT1″29.4M16×214.0M20×119.0M24×1.522.5M36×234.0ZG1 1/4″Rc1 1/4″PT1 1/4″38.0G1 1/8″35.2Z1 1/4″NPT1 1/4″38.2M18×2.515.5M22×121.0M27×1.525.5M42×240.0ZG1 1/2″Rc1 1/2″PT1 1/2″44.0G1 1/4″39.2Z1 1/2″NPT1 1/2″44.3M20×2.517.5M24×123.0M30×1.528.5M48×246.0ZG2″Rc2″PT2″56.0G1 1/2″45.1Z2″NPT2″56.3M24×321.0M27×126.0M33×1.531.5M52×250.0ZG2 1/2″Rc2 1/2″PT2 1/2″72.0G1 3/4″51M27×324.0M30×129.0M36×1.534.5ZG3″Rc3″PT3″84.0G2″56.9M30×3.526.5M42×1.540.5M30×327.0G1 1/4″62.95M33×3.529.5M48×1.546.5M33×330.0G2 1/2″72.45M36×432.0M36×333.0G2 3/4″78.8M42×4.537.5M42×339.0G3″85.2M48×543.0M48×345.0M52×547.0M52×349.0M56×5.550.5M64×658.0圆柱管螺孔公称尺寸底孔d布锥管螺孔攻丝前钻孔尺寸螺纹孔底尺寸表底孔d底孔d公称尺寸底孔d圆锥管螺孔公称尺寸底孔d公称尺寸底孔d攻丝前钻孔尺寸公称尺寸攻丝前钻孔尺寸

序号螺纹种类及螺距螺纹孔底直径最大孔底直径1M3x0.5Φ2.5Φ2.592M4x0.7Φ3.3Φ3.423M5x0.8Φ4.2Φ4.334M6x1Φ5Φ5.25M8x1.25Φ6.8Φ6.96M10x1.5Φ8.5Φ8.67M12x1.75Φ10.2Φ10.48M14x2Φ12Φ12.19M16x2Φ14Φ14.210M18x2.5Φ15.5Φ15.711M20x2.5Φ17.5Φ17.712M24x3Φ21Φ21.213M30x3.5Φ26.5Φ26.714M36x4Φ32Φ32.215M42x4.5Φ37.5Φ37.716M48x5Φ4343.2175/8-11UNCΦ13.6Φ13.8183/4-10UNCΦ16.6Φ16.819锥度管螺纹RC（PF)20RC1/8(PT)Φ8.2Φ8.521RC1/4(PT)Φ10.9Φ11.122RC3/8(PT)Φ14.4Φ14.623RC1/2(PT)Φ18Φ18.524RC3/4(PT)Φ23.5Φ23.825RC1(PT)Φ29.5Φ29.926RC1+1/4(PT)Φ38Φ38.527RC1+1/2(PT)Φ44Φ44.628RC2(PT)Φ55Φ55.629RC2+1/2(PT)Φ71Φ71.630平行管螺纹G(PF)31G1/8(PF)Φ8.6Φ8.832G1/4(PF)Φ11.5Φ11.8733G3/8(PF)Φ15.3834G1/2(PF)Φ19.135G5/8(PF)Φ2136G3/4(PF)Φ24.637G1(PF)Φ30.9螺纹底孔尺寸对照表