MM

MM

INDIA

British &

(Inside

US & Canada

French & Russian

German

Japanese

Swiss

(Inside Diameter)

Circumference)

Australian

9.91

31.13

0

-

-

-

-

-

10.72

33.68

0

-

-

-

-

-

11.53

36.22

0

-

-

-

-

-

11.95

37.54

42401

-

-

-

-

A

12.18

38.26

42463

-

-

-

-

A 1/2

12.37

38.86

1

-

-

1

-

B

12.6

39.58

1.25

-

-

-

-

B 1/2

12.78

40.15

1.5

-

-

-

-

C

13

40.84

1

1.75

-

-

-

-

C 1/2

13.21

41.5

2

41.5

13.5

2

1.5

D

13.4

42.13

2

2.25

-

-

-

-

D 1/2

13.61

42.76

2.5

42.75

13.75

3

2.75

E

13.7

3

13.83

43.45

2.75

-

-

-

-

E 1/2

14

44.14

4

3

44

14

4

4

F

14.15

44.45

3.125

-

-

-

-

F 1/2

14.25

44.77

3.25

-

-

-

-

F 3/4

14.3

5

14.36

45.11

3.375

45.25

-

5

5.25

G

14.45

45.4

3.5

-

14.5

-

-

G 1/4

14.56

45.74

3.625

-

-

6

-

G 1/2

14.6

6

14.65

46.02

3.75

46.5

-

-

6.5

H

14.86

46.68

4

-

15

7

-

H 1/2

15

7

15.04

47.25

4.25

47.75

-

-

7.75

I

15.27

47.97

4.5

-

15.25

8

-

I 1/2

15.3

8

15.4

48.38

4.625

49

15.5

-

9

J

15.53

48.79

4.75

-

-

-

-

J 1/4

15.6

9

15.7

49.32

5

-

15.75

9

-

J 1/2

15.8

49.64

5.125

50

-

-

10

K

15.9

49.95

10

5.25

-

-

-

-

K 1/4

16

50.27

5.375

-

-

10

-

K 1/2

16.1

50.58

5.5

51.75

16

-

11.75

L

16.2

11

16.3

51.21

5.75

-

-

-

-

L 1/4

16.41

51.55

5.875

-

-

-

-

L 1/2

16.5

51.87

12

6

52.75

16.5

12

12.75

M

16.71

52.5

6.25

-

-

-

-

M 1/2

16.8

13

16.92

53.16

6.5

54

17

13

14

N

17.13

53.82

6.75

-

-

-

-

N 1/2

17.2

14

17.35

54.51

7

55.25

17.25

14

15.25

O

17.45

54.82

7.25

-

-

-

-

O 1/2

17.5

15

17.75

55.76

7.5

56.5

17.75

15

16.5

P

17.8

16

17.97

56.45

7.75

-

-

-

-

P 1/2

18.1

17

18.19

57.15

8

57.75

18

16

17.75

Q

18.35

57.65

8.25

-

-

-

-

Q 1/2

18.4

18

18.53

58.21

8.5

-

18.5

17

-

Q 3/4

18.61

58.47

8.625

59

-

-

19

R

18.69

58.72

8.75

-

-

-

-

R 1/4

18.8

59.06

19

8.875

-

-

-

-

R 1/2

18.89

59.34

9

-

19

18

-

R 3/4

19.1

60

20

9.125

60.25

-

-

20.25

S

19.22

60.38

9.25

-

-

-

-

S 1/4

19.31

60.66

9.375

-

-

-

-

S 1/2

19.4

60.98

21

9.5

-

19.5

19

-

@ 3/4

19.51

61.29

9.625

61.5

-

-

21.5

T

19.62

61.64

9.75

-

-

-

-

T 1/4

19.7

22

19.84

62.33

10

-

20

20

-

T 1/2

20

62.89

23

10.25

62.75

-

21

22.75

U

20.2

63.46

10.5

-

20.25

22

-

U 1/2

20.3

63.84

24

10.625

63

-

-

23.75

V

20.44

64.21

10.75

-

-

-

-

V 1/4

20.6

64.97

25

11

-

20.75

23

-

V 1/2

20.76

65.22

11.125

65

-

-

25

W

20.85

65.5

11.25

-

-

-

-

W 1/4

20.94

65.78

11.375

-

-

-

-

W 1/2

21

66.22

26

11.5

-

21

24

-

W 3/4

21.18

66.54

11.625

66.25

-

-

26.25

X

21.24

66.73

11.75

-

-

-

-

X 1/4

21.3

66.92

27

11.875

-

-

-

-

X 1/2

21.49

67.51

12

67.5

21.25

25

27.5

Y

21.6

28

21.69

68.14

12.25

-

-

-

-

Y 1/2

21.89

68.77

12.5

68.75

21.75

26

28.75

Z

22

69.43

29

12.75

-

-

-

-

Z+1/2

22.3

70.15

30

13

-

22

27

-

Z+1

22.6

71

31

13.5

-

-

-

-

Z+1.5

22.69

71.28

-

-

-

-

-

Z+2

22.9

72

32

-

-

-

-

-

Z+2.5

23.06

72.45

-

-

-

-

-

Z+3

23.2

73.01

33

-

-

-

-

-

Z+3.5

23.47

73.73

-

-

-

-

-

Z+4

23.5

34

23.55

73.98

-

-

-

-

-

Z+4.5

23.9

74.99

35

-

-

-

-

-

Z+5

24.2

76.25

36

-

-

-

-

-

Z+6