Screw Thread Pitch
 

 

Nominal Major Thread
Diameter (mm)

  

Coarse Threads

  

Fine Threads

        
 

Standard Coarse Thread Pitch (mm)
p=1/n

Nominal Pitch Diameter (mm)

  

Fine Thread Pitch (mm)
p=1/n

Nominal Pitch Diameter (mm)

  

Extra or Super Fine

  

Japanese Standard JIS

1

  

0.25

 0.84  

-

 -        

1.6

  

0.35

 1.37  

0.20

 1.47        

2

  

.4

 1.74  

.25

 1.84  

-

  

.4

2.5

  

.45

 2.20  

0.35

 2.27  

-

  

.45

3

  

.5

 2.67  

0.35

 2.77  

-

  

.5

4

  

.7

 3.54  

0.50

 3.67  

-

  

.7

5

  

.8

 4.47  

0.50

 4.67  

-

  

.8

6

  

1.0

 5.34  

0.75

 5.51  

-

  

1.0

7

  

1.0

    

 

    

-

  

1.0

8

  

1.25

 7.18  

1.00

 7.34  

-

  

1.0

10

  

1.5

 9.01  

1.25

 9.18  

1

  

1.25

12

  

1.75

 10.85  

1.25

 11.18  

1.25

  

1.25

14

  

2

    

1.5

    

-

  

1.5

16

  

2

 14.68  

1.50

 15.01  

-

  

1.5

18

  

2.5

    

1.5

    

-

  

1.5

20

  

2.5

 18.35  

1.50

 19.01  

-

  

1.5

24

  

3.00

 22.02  

2.00

 22.68        

30

  

3.50

 27.69  

2.00

 28.68        

36

  

4.00

 33.36  

3.00

 34.02        

42

  

4.50

 39.03  

-

 -        

48

  

5.0

 44.70  

-

 -