| Drill Size | Decimal | Drill Size | Decimal | Drill Size | Decimal | Drill Size | Decimal |
| 80 | 0.0135 |
42 | 0.0935 |
13/64 | 0.2031 |
Y | 0.4040 |
| 79 | 0.0145 |
3/32 | 0.0937 |
6 | 0.2040 |
13/32 | 0.4062 |
| 1/64 | 0.0156 |
41 | 0.0960 |
5 | 0.2055 |
Z | 0.4130 |
| 78 | 0.0160 |
40 | 0.0980 |
4 | 0.2090 |
27/64 | 0.4219 |
| 77 | 0.0180 |
39 | 0.0995 |
3 | 0.2130 |
7/16 | 0.4375 |
| 76 | 0.0200 |
38 | 0.1015 |
7/32 | 0.2187 |
29/64 | 0.4531 |
| 75 | 0.0210 |
37 | 0.1040 |
2 | 0.2210 |
15/32 | 0.4687 |
| 74 | 0.0225 |
36 | 0.1065 |
1 | 0.2280 |
31/64 | 0.4844 |
| 73 | 0.0240 |
7/64 | 0.1094 |
A | 0.2340 |
1/2 | 0.5000 |
| 72 | 0.0250 |
35 | 0.1100 |
15/64 | 0.2344 |
33/64 | 0.5156 |
| 71 | 0.0260 |
34 | 0.1110 |
B | 0.2380 |
17/32 | 0.5312 |
| 70 | 0.0280 |
33 | 0.1130 |
C | 0.2420 |
35/64 | 0.5469 |
| 69 | 0.0292 |
32 | 0.1160 |
D | 0.2460 |
9/16 | 0.5625 |
| 68 | 0.0310 |
31 | 0.1200 |
1/4 | 0.2500 |
37/64 | 0.5781 |
| 1/32 | 0.0312 |
1/8 | 0.1250 |
E | 0.2500 |
19/32 | 0.5937 |
| 67 | 0.0320 |
30 | 0.1285 |
F | 0.2570 |
39/64 | 0.6094 |
| 66 | 0.0330 |
29 | 0.1360 |
G | 0.2610 |
5/8 | 0.6250 |
| 65 | 0.0350 |
28 | 0.1405 |
17/64 | 0.2656 |
41/64 | 0.6406 |
| 64 | 0.0360 |
9/64 | 0.1406 |
H | 0.2660 |
21/32 | 0.6562 |
| 63 | 0.0370 |
27 | 0.1440 |
I | 0.2720 |
43/64 | 0.6719 |
| 62 | 0.0380 |
26 | 0.1470 |
J | 0.2770 |
11/16 | 0.6875 |
| 61 | 0.0390 |
25 | 0.1495 |
K | 0.2810 |
45/64 | 0.7031 |
| 60 | 0.0400 |
24 | 0.1520 |
9/32 | 0.2812 |
23/32 | 0.7187 |
| 59 | 0.0410 |
23 | 0.1540 |
L | 0.2900 |
47/64 | 0.7344 |
| 58 | 0.0420 |
5/32 | 0.1562 |
M | 0.2950 |
3/4 | 0.7500 |
| 57 | 0.0430 |
22 | 0.1570 |
19/64 | 0.2969 |
49/64 | 0.7656 |
| 56 | 0.0465 |
21 | 0.1590 |
N | 0.3020 |
25/32 | 0.7812 |
| 3/64 | 0.0469 |
20 | 0.1610 |
5/16 | 0.3125 |
51/64 | 0.7969 |
| 55 | 0.0520 |
19 | 0.1660 |
O | 0.3160 |
13/16 | 0.8125 |
| 54 | 0.0550 |
18 | 0.1695 |
P | 0.3230 |
53/64 | 0.8281 |
| 53 | 0.0595 |
11/64 | 0.1719 |
21/64 | 0.3281 |
27/32 | 0.8437 |
| 1/16 | 0.0625 |
17 | 0.1730 |
Q | 0.3320 |
55/64 | 0.8594 |
| 52 | 0.0635 |
16 | 0.1770 |
R | 0.3390 |
7/8 | 0.8750 |
| 51 | 0.0670 |
15 | 0.1800 |
11/32 | 0.3437 |
57/64 | 0.8906 |
| 50 | 0.0700 |
14 | 0.1820 |
S | 0.3480 |
29/32 | 0.9062 |
| 49 | 0.0730 |
13 | 0.1850 |
T | 0.3580 |
59/64 | 0.9219 |
| 48 | 0.0760 |
3/16 | 0.1875 |
23/64 | 0.3594 |
15/16 | 0.9375 |
| 5/64 | 0.0781 |
12 | 0.1890 |
U | 0.3680 |
61/64 | 0.9531 |
| 47 | 0.0785 |
11 | 0.1910 |
3/8 | 0.3750 |
31/32 | 0.9687 |
| 46 | 0.0810 |
10 | 0.1935 |
V | 0.3770 |
63/64 | 0.9844 |
| 45 | 0.0820 |
9 | 0.1960 |
W | 0.3860 |
1 | 1.0000 |
| 44 | 0.0860 |
8 | 0.1990 |
25/64 | 0.3906 |
||
| 43 | 0.0890 |
7 | 0.2010 |
X | 0.3970 | ||