Tap & Drill Sizes

TAP

DRILL

TAP

DRILL

0 ‑ 80

3/64"

5/16 ‑ 18

17/64"

1 ‑ 64

1/16"

5/16 ‑ 24

9/32"

1 ‑ 72

1/16"

3/8 ‑ 16

21/64"

2 ‑ 56

5/64"

3/8 ‑ 24

11/32"

2 ‑ 64

5/64"

7/16 ‑ 14

3/8"

3 ‑ 48

3/32"

7/16 ‑ 20

25/64"

3 ‑ 56

3/32"

1/2 ‑ 13

27/64"

4 ‑ 40

3/32"

1/2 ‑ 20

29/64"

4 ‑ 48

3/32"

5/8 ‑ 11

17/32"

5 ‑ 40

7/64"

5/8 ‑ 18

37/64"

5 ‑ 48

7/64"

3/4 ‑ 10

21/32"

6 ‑ 32

7/64"

3/4 ‑ 16

11/16"

6 ‑ 40

1/8"

7/8 ‑ 9

49/64"

8 ‑ 32

9/64"

7/8 ‑ 14

13/16"

8 ‑ 36

9/64"

1" ‑ 8

7/8"

10 ‑ 24

5/32"

1" ‑ 12

29/32"

10 ‑ 32

11/64"

1‑1/4 ‑ 7

1‑7/64"

1/4 ‑ 20

7/32"

1‑1/4 ‑ 12

1‑11/64"

1/4 ‑ 28

7/32"

1‑1/2 ‑ 6

1‑21/64"

This is only a guide, Consider Material & Thickness