Free Table of tap drill and clearance drill sizes for Machine Screws

FREE TABLE!

NUMBER SIZE MACHINE SCREWS

TAP DRILL AND CLEARANCE DRILL SIZES

SCREW SIZE

THREADS PER INCH

DRILL SIZES

No.

O.D.

N.C.

N.F.

TAP

CLEAR

0

.060

 

80

3/64

#51

1

.073

64

 

#53

#47

1

.073

 

72

#53

#47

2

.086

56

 

#50

#42

2

.086

 

64

#50

#42

3

.099

48

 

#47

#37

3

.099

 

56

#46

#37

4

.112

40

 

#43

#31

4

.112

 

48

3/32

#31

5

.125

40

 

#38

#29

5

.125

 

44

#37

#29

6

.138

32

 

#36

#27

6

.138

 

40

#33

#27

8

.164

32

 

#29

#18

8

.164

 

36

#29

#18

10

.190

24

 

#26

#9

10

.190

 

32

#21

#9

12

.216

24

 

#16

#2

12

.216

 

28

#15

#2

Note: Tap Drill Sizes shown give approximately 75% depth of thread

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FRACTIONAL SIZE MACHINE SCREWS

TAP DRILL AND CLEARANCE DRILL SIZES

SCREW SIZE

THREADS PER INCH

DRILL SIZES

No.

O.D.

N.C.

N.F.

TAP

CLEAR

1/4

.250

20

 

#7

17/64

1/4

.250

 

28

#3

17/64

5/16

.312

18

 

F

21/64

5/16

.312

 

24

I

21/64

3/8

.375

16

 

5/16

25/64

3/8

.375

 

24

Q

25/64

7/16

.437

14

 

U

29/64

7/16

.437

 

20

25/64

29/64

1/2

.500

13

 

27/64

33/64

1/2

.500

 

20

29/64

33/64

9/16

.562

12

 

31/64

37/64

9/16

.562

 

18

33/64

37/64

5/8

.625

11

 

17/32

41/64

5/8

.625

 

18

37/64

41/64

3/4

.750

10

 

21/32

49/64

3/4

.750

 

16

11/16

49/64

7/8

.875

9

 

49/64

57/64

7/8

.875

 

14

13/16

57/64

1

1.000

8

 

7/8

1 1/4

1

1.000

 

14

15/16

1 1/4

Note: Tap Drill Sizes shown give approximately 75% depth of thread.

Copyright © 1999 - 2014 Aaron's General Store.com

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