ANSI Standard Straight Shank Twist Drill Sizes .0135 to 1.000

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




























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