last updated 

Radio Control Club of Rochester

AMA charter 465       since 1957

DEDICATED TO RESPONSIBLE R/C FUN
SAFETY BY CHOICE   NOT BY CHANCE

 
 
British American Metric Outside Tap Tap Drill Alternate Alternate
 Sizes Sizes Sizes Diameter Drill Diameter Tap Drill Tap Diam.
 (inches) (inches) (inches)
======= ======== ======= ======== ===== ======== ========= ==========
 0-80 .0600 3/64 .0469
1/16-60 .0625 3/64 .0469
10-BA .0669 #54  .0550
 1-64 .0730 #53 .0595
 1-72 .0730 #53 .0595
 9-BA .0748 #53 .0559
 2-56 .0860 #50 .0700
 2-64 .0860  #50 .0700
 8-BA .0865 1.8 mm .0709 #50 .0700
3/32-48 .0937 #48 .0760
 7-BA .0983 #47 .0785
 3-48 .0990 #47 .0785
  3-56 .0990 #46 .0810 #45 .0820
 6-BA .1102 2.3 mm .0905 #43 .0890
 4-40 .1120 #43 .0890 #44 .0860
 4-48 .1120  #42 .0935 #43 .0890
 3.0-0.6 .1181 2.4 mm .0945 3/32 .0938
 3.0-0.5 .1181 2.5 mm .0984 #40 .0980
1/8-40 5-40 .1250 #38 .1015
 5-44 .1250 #37 .1040
 5-BA .1259 #37 .1040
 3.5-0.6 .1378 2.9 mm .1142 #33 .1130
 6-32 .1380 #36 .1065
 6-40 .1380  #33 .1130
 4-BA .1417 3.0 mm .1181 #32 .1160
 4.0-0.75 .1575 3.2 mm .1260 1/8 .1250
 4.0-0.7 .1575 3.3 mm .1299 #30 .1285
 3-BA  .1614 #29 .1360
 8-32 .1640 #29 .1360
 8-36 .1640 #29 .1360
 2-BA .1850 4.0 mm .1575 #22 .1570
3/16-24 .1875  #27 .1440
3/16-32 .1875 #23 .1540
 10-24 .1900 #25 .1495 #26 .1470
 10-32 .1900 #21 .1590
 5-0.9 .1968 4.1 mm .1614 #20 .1610
 5-0.8 .1968 4.2 mm .1654 #19 .1660
 1-BA .2086 4.5 mm .1772 #16 .1770
 12-24 .2160 #16 .1770
 12-28 .2160  #15 .1800 #14 .1820
7/32-24 .2187 #16 .1770
7/32-26 .2187 #15 .1800
7/32-28 .2187 #14 .1820
 0-BA .2362 5.1 mm .2008 #7 .2010
 6-1.0 .2362 5.0 mm .1968 #9 .1960
1/4-20 .2500 #9 .1960
 1/4-20 .2500 #7 .2010
1/4-26 .2500 #4 .2090
  1/4-28 .2500 #3 .2130
 7-1.0 .2756 6.0 mm .2362 15/64 .2344
5/16-18 .3125 1/4 .2500
 5/16-18 .3125 F .2570
5/16-22  .3125 G .2610
 5/16-24 .3125 I (i) .2720
5/16-26 .3125 J .2770
 8-1.0 .3150 7.0 mm .2756 I (i) .2720
 8-1.25 .3150 6.8 mm .2677 H .2660
3/8-16 .3750 5/16 .3125
 3/8-16 .3750 5/16 .3125
3/8-20 .3750 P .3230
 3/8-24 .3750 Q .3320
3/8-26  .3750 Q .3320
 10-1.5 .3937 8.5 mm .3346 Q .3320
 10-1.25 .3973 8.8 mm .3465 S .3480
 10-1.0 .3973 9.0 mm .3543 S .3480
7/16-14 .4375 23/64 .3594
 7/16-14 .4375 U .3680
7/16-18 .4375 3/8 .3750
 7/16-20 .4375 25/64 .3906
7/16-26 .4375 Y  .4040
 12-1.75 .4724 10.3 mm .4055 Y .4040
 12-1.5 .4724 10.5 mm .4134 Z .4130
 12-1.25 .4724 10.8 mm .4252 27/64 .4219
 12-1.0 .4724 11.0 mm .4331 7/16 .4375
1/2-12 .5000 13/32 .4062
 1/2-13 .5000 27/64 .4219
1/2-20 .5000 7/16 .4375
 1/2-20 .5000 29/64 .4531
1/2-26 .5000 29/64 .4531
 14-2.0 .5512 12.0 mm .4724 15/32 .4688
 14-1.75 .5512 12.3 mm .4842 31/64 .4844
 14-1.5 .5512 12.5 mm .4921 1/2 .5000
 14-1.25 .5512 12.8 mm .5039 1/2 .5000
 14-1.0 .5512 13.0 mm .5118 33/64 .5156
 
 
-- Alan E. Frisbie Frisbie@Flying-Disk.Com
-- Flying Disk Systems, Inc.
-- 4759 Round Top Drive (213) 256-2575 (voice)
-- Los Angeles, CA 90065 (213) 258-3585 (FAX)