NPTF•NPSF美制標準管用耐密螺紋 絲攻VS鑽頭下孔徑表

產品特點

型號 : NPTF•NPSF美制標準管用耐密螺紋

絲攻VS鑽頭下孔徑表

○ 美制標準管用耐密螺紋 NPTF•NPSF Dryseal American Standard Pipe Threads

標稱
Nominalsize

推拔螺紋 Taper Thread

平行螺紋 Parallel thread

NPTF 鉆頭徑
Drill dia

NPSF

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

6.25

0.246

1/8-27

8.33

0.328

8.43

0.332

8.61

0.339

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

17.86

0.703

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

1 1/2-11 1/2

43.26

1.703

43.66

1.719

2-11 1/2

55.17

2.172

55.58

2.188

2 1/2-8

65.48

2.578

66.27

2.609

•鉆頭徑為美制管用螺紋ANSI B1.20.3-1976附屬書所託推薦鉆頭徑 (inch) 摘錄 •The drill sizes are quoted from ANSI B1.20.1-1976 dryseal pipe threads (inch) appendix.