HOTRODS & CLASSICS
TAP & DRILL SIZES
|
N.F. (SAE) |
N.C. (U.S.S.) |
DRILL |
|
1/4 |
28 |
NO. 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 |
|
11/16 |
16 |
5/8 |
|
3/4 |
16 |
11/16 |
|
7/8 |
14 |
13/16 |
|
1 |
14 |
15/16 |
|
N.C. (U.S.S.) |
THREADS |
DRILL |
|
1/4 |
20 |
NO. 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 |
|
11/16 |
11 |
19/32 |
|
3/4 |
10 |
21/32 |
|
13/16 |
10 |
23/32 |
|
7/8 |
9 |
49/64 |
|
15/16 |
9 |
53/64 |
|
8 |
7/8 |