NPT美制標準管用螺紋 NPT NPS (NPSC) American Standard Pipe Threads

Characteristic

Model : NPT美制標準管用螺紋

NPT NPS (NPSC) American Standard Pipe Threads

NPT NPS (NPSC) American Standard Pipe Threads

○ 美制標準管用螺紋 NPT NPS (NPSC) American Standard Pipe Threads

標稱
Nominalsize

推拔螺紋 Taper Thread

平行螺紋 Parallel thread

NPT 鉆頭徑
Drill dia

NPS (NPSC)

使用絞刀之場合
Use with reamer

不使用絞刀之場合
Without reamer

鉆頭徑
Drill dia

mm

inch

mm

inch

mm

inch

1/16-27

5.94

0.234

6.15

0.242

6.35

0.250

1/8-27

8.33

0.328

8.43

0.332

8.74

0.344

1/4-18

10.72

0.422

11.13

0.438

11.13

0.438

3/8-18

14.27

0.562

14.27

0.562

14.68

0.578

1/2-14

17.48

0.688

17.86

0.703

18.26

0.719

3/4-14

22.63

0.891

23.01

0.906

23.42

0.922

1-11 1/2

28.58

1.125

28.98

1.141

29.36

1.156

1 1/4-11 1/2

37.31

1.469

37.69

1.484

38.10

1.500

1 1/2-11 1/2

43.26

1.703

43.66

1.719

44.45

1.750

2-11 1/2

55.17

2.172

55.58

2.188

56.36

2.219

2 1/2-8

65.48

2.578

66.27

2.609

67.46

2.656

•鉆頭徑為美制管用螺紋ANSI/ASME B1.20.1-1983 附屬書所推薦鉆頭徑(inch)摘錄 •The drill sizes are quoted from ANSI/ASME B1.20.1-1983 pipe threads, general purpose (inch) appendix.