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TAP DRILL SIZES |
|
TAP
SIZE |
PITHCH |
TAP DRILL
SIZE (75%) |
TAP
SIZE |
PITHCH |
TAP DRILL
SIZE (75%) |
| 0
|
80
|
NF
|
3/64"
|
3/4"
|
16
|
NF
|
11/16"
|
| 1
|
64
|
NC
|
53
|
7/8"
|
9
|
NC
|
49/64"
|
| 1
|
72
|
NF
|
53
|
7/8"
|
14
|
NF
|
13/16"
|
| 2
|
56
|
NC
|
50
|
1"
|
8
|
NC
|
7/8"
|
| 2
|
64
|
NF
|
50
|
1"
|
12
|
NF
|
59/64"
|
| 3
|
48
|
NC
|
47
|
1"
|
14
|
NS
|
15/16"
|
| 3
|
56
|
NF
|
45
|
1-1/8"
|
7
|
NC
|
63/64"
|
| 4
|
40
|
NC
|
43
|
1-1/8"
|
12
|
NF
|
1-3/64"
|
| 4
|
48
|
NF
|
42
|
1-1/4"
|
7
|
NC
|
1-7/64"
|
| 5
|
40
|
NC
|
38
|
1-1/4"
|
12
|
NF
|
1-11/64"
|
| 5
|
44
|
NF
|
37
|
1-1/2"
|
6
|
NC
|
1-11/32"
|
| 6
|
32
|
NC
|
36
|
1-1/2"
|
12
|
NF
|
1-27/64"
|
| 6
|
40
|
NF
|
33
|
1-3/4"
|
5
|
NC
|
1-9/16"
|
| 8
|
32
|
NC
|
29
|
2"
|
4-1/2"
|
NC
|
1-25/32"
|
| 8
|
36
|
NF
|
29
|
1/8"
|
27
|
NPSC
|
11/32"
|
| 10
|
24
|
NC
|
25
|
1/4"
|
18
|
NPSC
|
7/16"
|
| 10
|
32
|
NF
|
21
|
3/8"
|
18
|
NPSC
|
37/64"
|
| 12
|
24
|
NC
|
16
|
1/2"
|
14
|
NPSC
|
23/32"
|
| 12
|
28
|
NF
|
14
|
3/4"
|
14
|
NPSC
|
59/64"
|
| 1/4"
|
20
|
NC
|
7
|
1"
|
11-1/2"
|
NPSC
|
1-5/32"
|
| 1/4"
|
28
|
NF
|
3
|
1-1/4"
|
11-1/2"
|
NPSC
|
1-1/2"
|
| 5/16"
|
18
|
NC
|
F
|
1-1/2"
|
11-1/2"
|
NPSC
|
1-3/4"
|
| 5/16"
|
24
|
NF
|
I
|
2"
|
11/12"
|
NPSC
|
2-7/32"
|
| 3/8"
|
16
|
NC
|
5/16
|
1/16"
|
27
|
NPT/NPTF
|
C
|
| 3/8"
|
24
|
NF
|
Q
|
1/8"
|
27
|
NPT/NPTF
|
Q
|
| 7/16
|
14
|
NC
|
U
|
1/4"
|
18
|
NPT/NPTF
|
7/16"
|
| 7/16
|
20
|
NF
|
25/64
|
3/8"
|
18
|
NPT/NPTF
|
9/16"
|
| 1/2"
|
13
|
NC
|
27/64
|
1/2"
|
14
|
NPT/NPTF
|
45/64"
|
| 1/2"
|
20
|
NF
|
29/64
|
3/4"
|
14
|
NPT/NPTF
|
29/32"
|
| 9/16"
|
12
|
NC
|
31/64
|
1"
|
11-1/2"
|
NPT/NPTF
|
1-9/64"
|
| 9/16"
|
18
|
NF
|
33/64
|
1-1/4"
|
11-1/2"
|
NPT/NPTF
|
1-31/64"
|
| 5/8"
|
11
|
NC
|
37/64
|
1-1/2"
|
11-1/2"
|
NPT/NPTF
|
1-23/32"
|
| 5/8"
|
18
|
NF
|
9/16
|
2"
|
11-1/2"
|
NPT/NPTF
|
2-3/16"
|
| 11/16"
|
11
|
NS
|
19/32
|
|
|
|
|
| 11/16"
|
16
|
NS
|
5/8
|
|
|
|
|
| 3/4"
|
10
|
NC
|
21/32
|
|
|
|
|
|
|
|
|
|
|
|
|
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