Thelen Tree Farm

Celebrating 13 Years - 2001 ~ 2014  



American Standard Drill Sizes

This Table lists the American Standard Number, Letter, & Fractional Drill Sizes - with their Decimal Equivalents.

Here are the Metric Size Drills
Drill
size
Decimal
Drill
size
Decimal
Drill
size
Decimal
80 .0135 1/8 .1250 O .3160
79 .0145 30 .1285 P .3230
1/64 .0156 29 .1360 21/64 .3281
78 .0160 28 .1405 Q .3320
77 .0180 9/64 .1406 R .3390
76 .0200 27 .1440 11/32 .3437
75 .0210 26 .1470 S .3480
74 .0225 25 .1495 T .3580
73 .0240 24 .1520 23/64 .3594
72 .0250 23 .1540 U .3680
71 .0260 5/32 .1562 3/8 .3750
70 .0280 22 .1570 V .3770
69 .0292 21 .1590 W .3860
68 .0310 20 .1610 25/64 .3906
1/32 .0313 19 .1660 X .3970
67 .0320 18 .1695 Y .4040
66 .0330 11/64 .1719 13/32 .4062
65 .0350 17 .1730 Z .4130
64 .0360 16 .1770 27/64 .4219
63 .0370 15 .1800 7/16 .4375
62 .0380 14 .1820 29/64 .4531
61 .0390 13 .1850 15/32 .4687
60 .0400 3/16 .1875 31/64 .4844
59 .0410 12 .1890 ½ .5000
58 .0420 11 .1910 33/64 .5156
57 .0430 10 .1935 17/32 .5312
56 .0465 9 .1960 35/64 .5469
3/64 .0469 8 .1990 9/16 .5625
55 .0520 7 .2010 37/64 .5781
54 .0550 13/64 .2031 19/32 .5937
53 .0595 6 .2040 39/64 .6094
1/16 .0625 5 .2055 5/8 .6250
52 .0635 4 .2090 41/64 .6406
51 .0670 3 .2130 21/32 .6562
50 .0700 7/32 .2187 43/64 .6719
49 .0730 2 .2210 11/16 .6875
48 .0760 1 .2280 45/64 .7031
5/64 .0781 A .2340 23/32 .7187
47 .0785 15/64 .2344 47/64 .7344
46 .0810 B .2380 ¾ .7500
45 .0820 C .2420 49/64 .7656
44 .0860 D .2460 25/32 .7812
43 .0890 E .2500 51/64 .7969
42 .0935 ¼ .2500 13/16 .8125
3/32 .0937 F .2570 53/64 .8281
41 .0960 G .2610 27/32 .8437
40 .0980 17/64 .2656 55/64 .8594
39 .0995 H .2660 7/8 .8750
37 .1040 J .2770 29/32 .9062
36 .1065 K .2811 59/64 .9219
7/64 .1093 9/32 .2812 15/16 .9375
35 .1100 I .2720 57/64 .8906
34 .1110 M .2950 31/32 .9687
33 .1130 19/64 .2968 63/64 .9844
32 .1160 N .3020 1 1.000
31 .1200 5/16 .3125