Machine
Screw Sizes

Drill

0-80

3/64"

1-56

54

1-64

53

1-72

53

2-56

50

2-64

50

3-48

47

3-56

45

4-32

45

4-36

44

4-40

43

4-48

42

5-36

40

5-40

38

5-44

37

6-32

36

6-36

34

6-40

33

7-30

31

7-32

31

7-36

1/8"

8-30

30

8-32

29

8-36

29

8-40

28

9-24

29

9-30

27

9-32

26

10-24

25

10-28

23

10-30

22

10-32

21

12-24

16

12-28

14

12-32

13

14-20

10

14-24

7

16-18

3

16-20

7/32"

16-22

2

18-18

B

18-20

D

20-16

G

20-18

17/64"

20-20

I

22-16

9/32"

22-18

L

24-16

5/16"

24-18

O

26-14

21/64"

26-16

R

28-14

T

28-16

23/64"

30-14

V

30-16

25/64"

Bolt Threads Size

Drill

1/16"-64

3/64

5/64"-60

1/16"

3/32"-48

49

7/64"-48

43

1/8"-32

3/32"

1/8"-40

38

9/64"-40

32

5/32"-32

1/8"

11/64"-32

9/64"

3/16"-24

26

3/16"-32

22

13/64"-24

20

7/32"-24

16

15/64"-24

10

1/4"-20

7

1/4"-28

3

5/16"-18

F

5/16"-24

1

3/8"-16

5/16"

3/8"-24

Q

7/16"-14

V

7/16"-20

25/64"

1/2"-12

27/64"

1/2"-13

27/64"

1/2"-20

29/64"

9/16"-28

1/64"

9/16"-18

33/64"

5/8"-11

17/32"

5/8"-18

37/64"

11/16"-11

19/32"

11/16"-16