Tap And Drill Chart
Machinist Screw Thread Tap - Drill Size Chart (UNC, UNF Series)
ANSI Standard Vee-Thread Recommended Tap Drill Size
INCH SIZE
NATIONAL COARSE |
| TAP SIZE |
DRILL SIZE |
| #0-80 |
3/64" |
| #1-64 |
#53 |
| #2-56 |
#51 |
| #3-48 |
5/64" |
| #4-40 |
#43 |
| #5-40 |
#39 |
| #6-32 |
#36 |
| #8-32 |
#29 |
| #10-24 |
#25 |
| #12-24 |
#17 |
| 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 |
1-11/32 |
| 1-3/4-5 |
1-35/64 |
| 2"-4-1/2 |
1-25/32 |
|
INCH SIZE
NATIONAL FINE |
| TAP SIZE |
DRILL SIZE |
| #1-72 |
#53 |
| #2-64 |
#50 |
| #3-56 |
#46 |
| #4-48 |
#42 |
| #5-44 |
#37 |
| #6-40 |
#33 |
| #8-36 |
#29 |
| #10-32 |
#21 |
| #12-28 |
#15 |
| 1/4-28 |
#3 |
| 5/16-24 |
I |
| 3/8-24 |
Q |
| 7/16-20 |
W |
| 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"-12 |
15/16 |
| 1-1/8-12 |
1-3/64 |
| 1-1/4-12 |
1-11/64 |
| 1-1/2-12 |
1-27/64 |
| 1-3/4-12 |
1-43/64 |
| 2"-12 |
1-59/64 |
|
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