American Threads

Size - Thread

Drill Size

Size - Thread

Drill Size

1/16 - 64

3/64

9/16 - 18

33/64

3/32 - 48

#49

5/8 - 11

17/32

1/8 - 40

#38

5/8 - 18

37/64

5/32 - 32

1/8

11/16 - 11

19/32

5/32 - 36

#30

11/16 - 16

5/8

3/16 - 24

#26

3/4 - 10

21/32

3/16 - 32

5/32

3/4 - 16

11/16

7/32 - 24

#16

7/8 - 9

49/64

7/32 - 32

3/16

7/8 - 14

13/16

1/4 - 20

13/64

1-8

7/8

1/4 - 24

#4

1-12

59/64

1/4 - 28

7/32

1-14

15/16

1/4 - 32

7/32

1 1/8 - 7

63/64

5/16 - 18

F

1 1/8 - 12

1 3/64

5/16 - 24

I

1 1/4 - 7

1 7/64

5/16 -32

9/32

1 1/4 - 12

1 11/64

3/8 -16

5/16

1 3/8 - 6

1 11/64

3/8 - 24

Q

1 3/8 - 12

1 19/64

7/16 -14

3/8

1 1/2 - 6

1 11/32

7/16 -20

25/64

1 1/2 - 12

1 27/64

1/2 - 12

27/64

1 5/8 - 5 1/2

1 7/16

1/2 - 13

27/64

1 3/4 - 5

1 9/16

1/2 - 20

7/16

1 7/8 - 5

1 11/16

9/16 - 12

31/64

2 - 4

1 13/16

 

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