Tap Drill Chart Metric


0M1.6 - M20 | M22 - M38

NOMINAL TAP SIZE
T.P.I.
TAP DRILL
DEC EQUIV.
% OF THREAD
NOMINAL TAP SIZE
T.P.I.
TAP DRILL
DEC EQUIV.
% OF THREAD
M1.6 0.35 1.25MM .0492 77 M8.0 1.25 6.75MM .2657 77
    1.30MM .0512 66     6.80MM .2677 74
    #55 .0520 61     LTR I .2720 67
M1.8 0.35 1.45MM .0571 77 M8.0 1.0 7.00MM .2756 77
    1.50MM .0591 66     LTR J .2770 74
    #53 .0595 64 M10.0 1.5 8.50MM .3346 77
M2.0 0.40 1.60MM .0630 77     LTR R .3390 71
    #52 .0635 74 M10.0 1.25 8.75MM .3445 77
M2.2 0.45 1.75MM .0689 77     LTR S .3480 71
    #50 .0700 72 M12.0 1.75 13/32 .4062 74
M2.5 0.45 2.05MM .0807 77     LTR Z .4130 66
    #45 .0820 71 M12.0 1.25 27/64 .4219 79
M3.0 0.50 2.50MM .0984 77     11.0MM .4331 62
    #39 .0995 73 M14.0 2.0 12.0MM .4727 77
M3.5 0.60 2.90MM .1142 77     31/64 .4844 65
    #32 .1160 71 M14.0 1.5 12.5 MM .4921 77
M4.0 0.70 3.30 MM .1299 77     1/2 .5000 67
    3.40 MM .1339 66 M16.0 2.0 14.0 MM .5512 77
    #29 .1360 60     9/16 .5625 66
M4.5 0.75 3.75 MM .1476 77 M16.0 1.5 14.5 MM .5709 77
    #25 .1495 72     37/64 .5781 68
M5.0 0.80 4.20 MM .1654 77 M18.0 2.5 15.5 MM .6102 77
    #18 .1695 67     5/8 .6250 65
M6.0 1.00 5.00 MM .1969 77 M18.0 1.5 16.5 MM .6496 77
    #8 .1990 73     21/43 .6562 68
M7.0 1.00 6.00 MM .2362 77 M20.0 1.5 18.5 MM .7283 77
 ##  # LTR B .2380 74 M20.0 1.5 47/64 .7344 69

 

 

 

 

 

NOMINAL TAP SIZE
T.P.I.
TAP DRILL
DEC EQUIV.
% OF THREAD
M22.0 2.5 19.5 MM .7677 77
   # 25/32 .7812 66
M22.0 1.5 20.5 MM .8071 77
   # 13/16 .8125 70
M24.0 3.0 21.0 MM .8268 77
   # 27/32 .8438 66
M24.0 2.0 22.0 MM .8661 77
   # 7/8 .8750 68
M27.0 3.0 24.0 MM .9449 77
   # 61/64 .9531 72
M27.0 2.0 25.0 MM .9843 77
   # 63/64 .9844 77
M30.0 3.5 26.5 MM 1.0433 77
   # 1-1/16 1.0625 66
M30.0 2.0 28.0 MM 1.1024 77
   ## 1-7/64 1.1094 70
M33.0 3.5 29.5 MM 1.1614 77
   # 1-11/64 1.1719 71
M33.0 2.0 31.0 MM 1.2205 77
   # 1-15/64 1.2344 63
M36.0 4.0 32.0 MM 1.2598 77
   # 1-17/64 1.2656 74
M36.0 3.0 1-19/64 1.2969 78
   # 1-5/16 1.3125 68
M38.0 4.0 34.0MM 1.3386 77
M38.0 # 1-23/64 1.3594 63

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beeind.com
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