Tap Drill
Charts
INCH_SIZES_-_NATIONAL_COARSE
INCH SIZES - NATIONAL FINE
TAPER PIPE SIZES - NPT
STRAIGHT PIPE SIZES - NPS
METRIC COARSE SIZES
METRIC FINE SIZES
While every precaution has been
taken in the preparation of these charts, we assume no responsibility
for
errors or omissions. Neither is any liability assumed for damages
resulting
from the use of the information contained herein.
TAP
DRILL
SIZE
SIZE
#0-80
3/64
#1-64
#53
#2-56
#50
#3-48
#47
#4-40
#43
#5-40
#38
#6-32
#36
#8-32
#29
#10-24
#25
#12-24
#16
1/4-20
#7
5/16-18
F
3/8-16
5/16
7/16-14
U
1/2-13
27/64
9/16-12
31/64
5/8-11
17/32
3/4-10
21/32
7/8-9
49/64
1"-8
7/8
1-1/8-7
63/64
1-1/4-7
1-7/64
1-1/2-6
1-21/64
1-3/4-5
1-35/64
2"-4.5
1-25/32
2-1/4-4.5
2-1/32
2-1/2-4
2-1/4
2-3/4-4
2-1/2
3-4
2-3/4
3-1/4-4
3
3-1/2-4
3-1/4
3-3/4-4
3-1/2
4-4
3-3/4
Watton Home | Tap Drill Chart List
While every precaution has been
taken in the preparation of these charts, we assume no responsibility
for
errors or omissions. Neither is any liability assumed for damages
resulting
from the use of the information contained herein.
TAP
DRILL
SIZE
SIZE
#1-72
#53
#2-64
#50
#3-56
#45
#4-48
#42
#5-44
#37
#6-40
#33
#8-36
#29
#10-32
#21
#12-28
#14
1/4-28
#3
5/16-24
I
3/8-24
Q
7/16-20
25/64
1/2-20
29/64
9/16-18
33/64
5/8-18
37/64
3/4-16
11/16
7/8-14
13/16
1"-14
15/16
1-1/8-12
1-3/64
1-1/4-12
1-11/64
1-1/2-12
1-27/64
Watton Home | Tap Drill Chart List
While every precaution has been
taken in the preparation of these charts, we assume no responsibility
for
errors or omissions. Neither is any liability assumed for damages
resulting
from the use of the information contained herein.
TAP
DRILL
SIZE
SIZE
1mm x
.25
.75mm
1.1 x
.25
.85
1.2 x
.25
.95
1.4 x
.3
1.1
1.6 x
.35
1.25
1.7 x
.35
1.3
1.8 x
.35
1.45
2 x
.4
1.6
2.2 x
.45
1.75
2.5 x
.45
2.05
3 x
.5
2.5
3.5 x
.6
2.9
4 x
.7
3.3
4.5 x
.75
3.7
5 x
.8
4.2
6 x
1
5
7 x
1
6
8 x
1.25
6.8
9 x
1.25
7.8
10 x
1.5
8.5
11 x
1.5
9.5
12 x
1.75
10.2
14 x
2
12
16 x
2
14
18 x
2.5
15.5
20 x
2.5
17.5
22 x
2.5
19.5
24 x
3
21
27 x
3
24
30 x
3.5
26.5
33 x
3.5
29.5
36 x
4
32
39 x
4
35
Watton Home | Tap Drill Chart List
While every precaution has been
taken in the preparation of these charts, we assume no responsibility
for
errors or omissions. Neither is any liability assumed for damages
resulting
from the use of the information contained herein.
TAP
DRILL
SIZE
SIZE
4 mm x
.35
3.6mm
4 x
.5
3.5
5 x
.5
4.5
6 x
.5
5.5
6 x
.75
5.25
7 x
.75
6.25
8 x
.5
7
8 x
.75
7.25
8 x
1
7.5
9 x
1
8
10 x
.75
9.25
10 x
1
9
10 x
1.25
8.8
11 x
1
10
12 x
.75
11.25
12 x
1
11
12 x
1.5
10.5
14 x
1
13
14 x
1.25
12.8
14 x
1.5
12.5
16 x
1
15
16 x
1.5
14.5
18 x
1
17
18 x
2
16
20 x
1
19
20 x
1.5
18.5
20 x
2
18
22 x
1
21
22 x
1.5
20.5
22 x
2
20
24 x
1.5
22.5
24 x
2
22
26 x
1.5
24.5
27 x
1.5
25.5
27 x
2
25
28 x
1.5
26.5
30 x
1.5
28.5
30 x
2
28
33 x
2
31
36 x
3
33
39 x
3
36
Watton Home | Tap Drill Chart List
While every precaution has been
taken in the preparation of these charts, we assume no responsibility
for
errors or omissions. Neither is any liability assumed for damages
resulting
from the use of the information contained herein.
TAP
DRILL
SIZE
SIZE
1/8-27
R
1/4-18
7/16
3/8-18
37/64
1/2-14
23/32
3/4-14
59/64
1"-11.5
1-5/32
1-1/4-11.5
1-1/2
1-1/2-11.5
1-47/64
2"-11.5
2-7/32
2-1/2-8
2-5/8
3"-8
3-1/4
3-1/2-8
3-3/4
4"-8
4-1/4
4-1/2-8
4-3/4
5-8
5-9/32
6-8
6-11/32
Watton Home | Tap Drill Chart List
While every precaution has been
taken in the preparation of these charts, we assume no responsibility
for
errors or omissions. Neither is any liability assumed for damages
resulting
from the use of the information contained herein.
TAP
DRILL
SIZE
SIZE
1/8-27
S
1/4-18
29/64
3/8-18
19/32
1/2-14
47/64
3/4-14
15/16
1"-11.5
1-3/16
1-1/4-11.5
1-33/64
1-1/2-11.5
1-3/4
2"-11.5
2-7/32
2-1/2-8
2-21/32
3"-8
3-9/32
3-1/2-8
3-25/32
4"-8
4-9/32
4-1/2-8
4-25/32
5-8
5-11/32
6-8
6-13/32
Watton Home | Tap Drill Chart List
While every precaution has been taken in the preparation of these charts, we assume no responsibility for errors or omissions. Neither is any liability assumed for damages resulting from the use of the information contained herein.