ANSI Drill Sizes
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Drill (in.) Drill (in.) Decimal Drill (in.)  
FORUM CONTENTS

Up
ANSI Drill Sizes
Metric to Inches

80 .0135 1/8 .1250 O
79 .0145 30 .1285 P
1/64 .0156 29 .1360 21/64
78 .0160 28 .1405 Q
77 .0180 9/64 .1406 R
76 .0200 27 .1440 11/32
75 .0210 26 .1470 S
74 .0225 25 .1495 T
73 .0240 24 .1520 23/64
72 .0250 23 .1540 U
71 .0260 5/32 .1562 3/8
70 .0280 22 .1570 V
69 .0292 21 .1590 W
68 .0310 20 .1610 25/64
1/32 .0313 19 .1660 X
67 .0320 18 .1695 Y
66 .0330 11/64 .1719 13/32
65 .0350 17 .1730 Z
64 .0360 16 .1770 27/64
63 .0370 15 .1800 7/16
62 .0380 14 .1820 29/64
61 .0390 13 .1850 15/32
60 .0400 3/16 .1875 31/64
59 .0410 12 .1890 =BD
58 .0420 11 .1910 33/64
57 .0430 10 .1935 17/32
56 .0465 9 .1960 35/64
3/64 .0469 8 .1990 9/16
55 .0520 7 .2010 37/64
54 .0550 13/64 .2031 19/32
53 .0595 6 .2040 39/64
1/16 .0625 5 .2055 5/8
52 .0635 4 .2090 41/64
51 .0670 3 .2130 21/32
50 .0700 7/32 .2187 43/64
49 .0730 2 .2210 11/16
48 .0760 1 .2280 45/64
5/64 .0781 A .2340 23/32
47 .0785 15/64 .2344 47/64
46 .0810 B .2380 =BE
45 .0820 C .2420 49/64
44 .0860 D .2460 25/32
43 .0890 E .2500 51/64
42 .0935 =BC .2500 13/16
3/32 .0937 F .2570 53/64
41 .0960 G .2610 27/32
40 .0980 17/64 .2656 55/64
39 .0995 H .2660 7/8
38 .1015 I .2720 57/64
37 .1040 J .2770 29/32
36 .1065 K .2811 59/64
7/64 .1093 9/32 .2812 15/16
35 .1100 L .2900 61/64
34 .1110 M .2950 31/32
33 .1130 19/64 .2968 63/64
32 .1160 N .3020 1
31 .1200 5/16 .3125