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Drills Clearance Hole Drills

Number  Aluminum, Brass  Stainless Steel, 

Machine Screw Size All Materials
of  Minor  & Plastics          Steels & Iron     
Threads  Dia. 75% Thread 50% Thread
Per Inch Close Fit Free Fit
No. or  Drill  Decimal  Decimal  Decimal  Decimal 
Major Dia. Drill Size Drill Size Drill Size
Dia. Size Equiv. Equiv. Equiv. Equiv.
0 .0600 80 .0447 3/64 .0469 55 .0520 52 .0635 50 .0700
64 .0538 53 .0595 1/16 .0625
1 .0730 48 .0760 46 .0810
72 .0560 53 .0595 52 .0635
56 .0641 50 .0700 49 .0730
2 .0860 43 .0890 41 .0960
64 .0668 50 .0700 48 .0760
48 .0734 47 .0785 44 .0860
3 .0900 37 .1040 35 .1100
56 .0771 45 .0820 43 .0890
40 .0813 43 .0890 41 .0960
4 .1120 32 .1160 30 .1285
48 .0864 42 .0935 40 .0980
40 .0943 38 .1015 7/64 .1094
5 .1250 30 .1285 29 .1360
44 .0971
0971 37 .1040
1040 35 1100
.1100
32 .0997 36 .1065 32 .1160
6 .1380 27 .1440 25 .1495
40 .1073 33 .1130 31 .1200
32 .1257 29 .1360 27 .1440
8 .1640 18 .1695 16 .1770
36 .1299 29 .1360 26 .1470
24 .1389 25 .1495 20 .1610
10 .1900 9 .1960 7 .2010
32 .1517 21 .1590 18 .1695
24 .1649 16 .1770 12 .1890
12 .2160 28 .1722 14 .1820 10 .1935 2 .2210 1 .228
32 .1777 13 .1850 9 .1960
20 .1887 7 .2010 7/32 .2188
1/4 .2500 28 .2062 3 .2130 1 .2280 F .2570 H .2660
32 .2117 7/32 .2188 1 .2280
18 .2443 F .2570 J .2770
5/16 .3125 24 .2614 I .2720 9/32 .2812 P .3230 Q .3320
32 .2742 9/32 .2812 L .2900
16 .2983 5/16 .3125 Q .3320
3/8 .3750 24 .3239 Q .3320 S .3480 W .3860 X .3970
32 .3367 11/32 .3438 T .3580
14 .3499
3499 U .3680
3680 25/64 .3906
3906
7/16 .4375 20 .3762 25/64 .3906 13/32 .4062 29/64 .4531 15/32 .4687
28 .3937 Y .4040 Z .4130
13 .4056 27/64 .4219 29/64 .4531
1/2 .5000 20 .4387 29/64 .4531 15/32 .4688 33/64 .5156 17/32 .5312
28 .4562 15/32 .4688 15/32 .4688
12 .4603 31/64 .4844 33/64 .5156
9/16 .5625 18 .4943 33/64 .5156 17/32 .5312 37/64 .5781 19/32 .5938
24 .5514 33/64 .5156 17/32 .5312
11 .5135 17/32 .5312 9/16 .5625
5/8 .6250 18 .5568 37/64 .5781 19/32 .5938 41/64 .6406 21/32 .6562
24 .5739 37/64 .5781 19/32 .5938
11/16 .5875 24 .6364 41/64 .6406 21/32 .6562 45/64 .7031 23/32 .7188
10 .6273 21/32 .6562 11/16 .6875
3/4 .7500 16 .6733 11/16 .6875 45/64 .7031 49/64 .7656 25/32 .7812
20 .6887 45/64 .7031 23/32 .7188
13/16 .8125 20 .7512 49/64 .7656 25/32 .7812 53/64 .8281 27/32 .8438
9 .7387 49/64 .7656 51/64 .7969
7/8 .8750 14 .7874 13/16 .8125 53/64 .8281 57/64 .8906 29/32 .9062
20 .8137
8137 53/64 .8281
8281 27/32 .8438
8438
15/16 .9375 20 .8762 57/64 .8906 29/32 .9062 61/64 .9531 31/32 .9688
8 .8466 7/8 .8750 59/64 .9219
1 1.000 12 .8978 15/16 .9375 61/64 .9531 1‐1/64 1.0156 1‐1/32 1.0313
20 .9387 61/64 .9531 31/32 .9688
1‐1/16 1.0625 18 .9943 1.000 1.000 1‐1/64 1.1056 1‐5/64 1.0781 1‐3/32 1.0938
7 .9497 63/64 .9844 1‐1/32 1.0313
1‐1/8 1.1250 12 1.0228 1‐3/64 1.0469 1‐5/64 1.0781 1‐9/64 1.1406 1‐5/32 1.1562
18 1.0568 1‐1/16 1.0625 1‐5/64 1.0781
1‐3/16 1.1875 18 1.1193 1‐1/8 1.1250 1‐9/64 1.1406 1‐13/64 1.2031 1‐7/32 1.2188