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Drill Sizes Lettered

Letter Diameter
(in)
  Letter Diameter
(in)
A 0.234 N 0.302
B 0.238 O 0.316
C 0.242 P 0.323
D 0.246 Q 0.332
E 0.250 R 0.339
F 0.257 S 0.348
G 0.261 T 0.358
H 0.266 U 0.368
I 0.272 V 0.377
J 0.277 W 0.386
K 0.281 X 0.397
L 0.290 Y 0.404
M 0.295 Z 0.413