Standard: ISO Metric (Coarse)

Nominal Thread (D)

Pitch

M2

0.40

(M2.5)

0.45

M3

0.50

(M3.5)

0.60

M4

0.70

(M4.5)

0.75

M5

0.80

M6

1.00

M8

1.25

(M9)

1.25

M10

1.50

(M11)

1.50

M12

1.75

(M14)

2.00

M16

2.00

(M18)

2.50

M20

2.50

(M22)

2.50

M24

3.00

(M27)

3.00

M30

3.50

(M33)

3.50

M36

4.00

(M39)

4.00

M42

4.50

(M45)

4.50

M48

5.00

(M52)

5.00

Standard: ISO Metric (Fine)

Nominal Thread (D)

Pitch

M8

1.00

M10

1.00

M10

1.25

M12

1.25

M12

1.50

(M14)

1.50

M16

1.50

(M18)

1.50

(M18)

2.00

M20

1.50

M20

2.00

(M22)

1.50

(M22)

2.00

M24

2.00

(M27)

2.00

M30

2.00

(M33)

2.00

M36

3.00

(M39)

3.00

M42

3.00

(M45)

3.00

M48

3.00

(M52)

4.00

Standard: UNC

Nominal Thread (D)

TPI

1/4''

20

5/16''

18

3/8''

16

7/16''

14

1/2''

13

9/16''

12

5/8''

11

3/4''

10

7/8''

9

1''

8

1-1/8''

7

1-1/4''

7

1-3/8''

6

1-1/2''

6

1-3/4''

5

Standard: UNF

Nominal Thread (D)

TPI

1/4''

28

5/16''

24

3/8''

24

7/16''

20

1/2''

20

9/16''

18

5/8''

18

3/4''

16

7/8''

14

1''

12

1-1/8''

12

1-1/4''

12

1-3/8''

12

1-1/2''

12

Standard: BSW

Nominal Thread (D)

TPI

1/8''

40

3/16''

24

1/4''

20

5/16''

18

3/8''

16

7/16''

14

1/2''

12

9/16''

12

5/8''

11

3/4''

11

7/8''

10

1''

9

1-1/8''

8

1-1/4''

7

1-3/8''

6

1-1/2''

6

1-5/8''

5

1-3/4''

5