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Letter and Number Drill Sizes |
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Letter and Number Drill Sizes
Letter Sizes |
Drill Diameter
(in.) |
Wire Gauge Sizes |
Drill Diameter
(in.) |
Wire Gauge Sizes |
Drill Diameter (in.) |
Wire Gauge Sizes |
Drill Diameter
(in.) |
Z |
0.413 |
1 |
0.2280 |
28 |
0.1405 |
55 |
0.0520 |
Y |
0.404 |
2 |
0.2210 |
29 |
0.1360 |
56 |
0.0465 |
X |
0.397 |
3 |
0.2130 |
30 |
0.1285 |
57 |
0.0430 |
W |
0.386 |
4 |
0.2090 |
31 |
0.1200 |
58 |
0.0420 |
V |
0.377 |
5 |
0.2055 |
32 |
0.1160 |
59 |
0.0410 |
U |
0.368 |
6 |
0.2040 |
33 |
0.1130 |
60 |
0.0400 |
T |
0.358 |
7 |
0.2010 |
34 |
0.1110 |
61 |
0.0390 |
S |
0.348 |
8 |
0.1990 |
35 |
0.1100 |
62 |
0.0380 |
R |
0.339 |
9 |
0.1960 |
36 |
0.1065 |
63 |
0.0370 |
Q |
0.332 |
10 |
0.1935 |
37 |
0.1040 |
64 |
0.0360 |
P |
0.323 |
11 |
0.1910 |
38 |
0.1015 |
65 |
0.0350 |
O |
0.316 |
12 |
0.1890 |
39 |
0.0995 |
66 |
0.0330 |
N |
0.302 |
13 |
0.1850 |
40 |
0.0980 |
67 |
0.0320 |
M |
0.295 |
14 |
0.1820 |
41 |
0.0960 |
68 |
0.0310 |
L |
0.290 |
15 |
0.1800 |
42 |
0.0935 |
69 |
0.0292 |
K |
0.281 |
16 |
0.1770 |
43 |
0.0890 |
70 |
0.0280 |
J |
0.277 |
17 |
0.1730 |
44 |
0.0860 |
71 |
0.0260 |
I |
0.272 |
18 |
0.1695 |
45 |
0.0820 |
72 |
0.0250 |
H |
0.266 |
19 |
0.1660 |
46 |
0.0810 |
73 |
0.0240 |
G |
0.261 |
20 |
0.1610 |
47 |
0.0785 |
74 |
0.0225 |
F |
0.257 |
21 |
0.1590 |
48 |
0.0760 |
75 |
0.0210 |
E |
0.250 |
22 |
0.1570 |
49 |
0.0730 |
76 |
0.0200 |
D |
0.246 |
23 |
0.1540 |
50 |
0.0700 |
77 |
0.0180 |
C |
0.242 |
24 |
0.1520 |
51 |
0.0670 |
78 |
0.0160 |
B |
0.238 |
25 |
0.1495 |
52 |
0.0635 |
79 |
0.0145 |
A |
0.234 |
26 |
0.1470 |
53 |
0.0595 |
80 |
0.0135 |
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27 |
0.1440 |
54 |
0.0550 |
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