Drill & Tap Sizes
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Joe with
Ramming Speed at BattleBots in Nov '01


Mike and Joe with Ramming Speed at BattleBots in May '01

Drill / Tap Size
Decimal Number/Letter Fraction Tap Size
.0135 80    
.0145 79    
.0156   1/64  
.0160 78    
.0180 77    
.0200 76    
.0210 75    
.0225 74    
.0240 73    
.0250 72    
.0260 71    
.0280 70    
.0292 69    
.0310 68    
.0312   1/32  
.0320 67    
.0330 66    
.0350 65    
.0360 64    
.0370 63    
.0380 62    
.0390 61    
.0400 60    
.0410 59    
.0420 58    
.0430 57    
.0465 56    
.0469   3/64 0-80
.0520 55    
.0550 54   1-56
.0595 53    
.0625   1/16  
.0635 52    
.0670 51    
.0700 50   2-56, 2-64
.0730 49    
.0760 48    
.0781   5/64  
.0785 47   3-48
.0810 46    
.0820 45   3-56
.0860 44   4-38
.0890 43   4-40
.0935 42   4-48
.0937   3/32  
.0960 41    
.0980 40    
.0995 39    
.1015 38   5-40
.1040 37   5-44
.1065 36   6-32
.1094   7/64  
.1100 35    
.1110 34   6-36
.1130 33   6-40
.1160 32    
.1200 31    
.1250   1/8  
.1285 30    
.1360 29   8-32, 8-36
.1405 28   8-40
.1406   9/64  
.1440 27    
.1470 26    
.1495 25   10-24
.1520 24    
.1540 23    
.1562   5/32  
.1570 22    
.1590 21    
.1610 20    
.1660 19    
.1695 18    
.1719   11/64  
.1720 17    
.1770 16   12-24
.1800 15    
.1820 14   12-28
.1850 13   12-32
.1875   3/16  
.1890 12    
.1910 11    
.1935 10    
.1960 9    
.1990 8    
.2010 7   1/4-20
.2031   13/64  
.2040 6    
.2055 5    
.2090 4    
.2130 3   1/4-28
.2187   7/32  
.2210 2    
.2280 1    
.2340 A    
.2344   15/64  
.2380 B    
.2420 C    
.2460 D    
.2500 E 1/4  
.2570 F   5/16-18
.2610 G    
.2656   17/64  
.2660 H    
.2720 I   5/16-24
.2770 J    
.2810 K    
.2812   9/32  
.2900 L    
.2950 M    
.2969   19/64  
.3020 N    
.3125   5/16 3/8-16
.3160 O    
.3230 P    
.3281   21/64  
.3320 Q   3/8-24
.3390 R    
.3437   11/32  
.3480 S    
.3580 T    
.3594   23/64  
.3680 U   7/16-14
.3750   3/8  
.3770 V    
.3860 W    
.3906   25/64 7/16-20
.3970      
.4040 Y    
.4062   13/32  
.4130 Z    
.4219   27/64 1/2-13
.4375   7/16  
.4531   29/64 1/2-20
.4687   15/32  
.4844   31/64 9/16-12
.5000   1/2  
.5156   33/64 9/16-18
.5312   17/32 5/8-11
.5469   35/64  
.5625   9/16  
.5781   37/64 5/8-18
.5937   19/32  
.6094   39/64 11/16-11
.6250   5/8 11/16-16
.6406   41/64  
.6562   21/32 3/4-10
.6719   43/64  
.6875   11/16 3/4-16
.7031   45/64  
.7187   23/32  
.7344   47/64  
.7500   3/4  
.7656   49/64 7/8-9
.7812   25/32  
.7969   51/64  
.8125   13/16 7/8-14
.8281   53/64  
.8437   27/32  
.8594   55/64  
.8750   7/8 1-8
.8906   57/64  
.9062   29/32  
.9219   59/64 1-12
.9375   15/16 1-14
.9531   61/64  
.9687   31/32  
.9844   63/64  
1.000   1

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