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  • Product Name: Thread Standard

BSPT, full name is British Standard Pipe Thread, is standard of British taper pipe thread, thread angle is 55°, thread taper is 1:16.

NPT, full name is National(American)Pipe Thread, is standard of American taper pipe thread, thread angle is 60°, thread taper is 1:16.

 

                                                    BSPT Basic Dimension Table

 Dia (inch

Threads No.

Pitch(mm)

Height of Threads    (mm)

Thread Length(mm)

Normal

Max.

Min.

1/16

28

0.907

0.581

6.5

7.4

5.6

1/8

28

0.907

0.581

6.5

7.4

5.6

1/4

19

1.337

0.856

9.7

11

8.4

3/8

19

1.337

0.856

10.1

11.4

8.8

1/2

14

1.814

1.162

13.2

15

11.4

3/4

14

1.814

1.162

14.5

16.3

12.7

1

11

2.309

1.479

16.8

19.1

14.5

1 1/4

11

2.309

1.479

19.1

21.4

16.8

1 1/2

11

2.309

1.479

19.1

21.4

16.8

2

11

2.309

1.479

23.4

25.7

21.1

2 1/2

11

2.309

1.479

26.7

30.2

23.2

3

11

2.309

1.479

29.8

33.3

26.3

4

11

2.309

1.479

35.8

39.3

32.3

5

11

2.309

1.479

40.1

43.6

36.6

6

11

2.309

1.479

40.1

43.6

36.6

 

                                  NPT Basic Dimension Table

Dia.(Inch)

Threads No. 

Pitch(mm)

Height of Threads (mm)

Min. Thread Length  (mm)

1/16

27

0.941

0.752

6.886

1/8

27

0.941

0.752

6.924

1/4

18

1.411

1.129

10.018

3/8

18

1.411

1.129

10.329

1/2

14

1.814

1.451

13.571

3/4

14

1.814

1.451

14.061

1

11.5

2.209

1.767

16.786

1 1/4

11.5

2.209

1.767

17.294

1 1/2

11.5

2.209

1.767

17.294

2

11.5

2.209

1.767

17.691

2 1/2

8

3.175

2.540

23.685

3

8

3.175

2.540

25.813

4

8

3.175

2.540

27.781

5

8

3.175

2.540

30.162

6

8

3.175

2.540

30.670

Contact us

Add: Yuhang District, Hangzhou, Baizhang Town, Xikou Village, 100 on the 2nd Road
Tel:0571-88566596 88566597 88566598
Pho:0571-88566597
E_mail:admin@sdmachine.com.cn
Code:311118