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The fine pitch is to be used only when the preferred series, Coarse Thread Pitch is not suitable for the design due to wall thickness or limited space considerations. 
 
Size (mm) Available Pitches (mm) Tap Drill (mm) Clearance Drill (mm)
 8  1  7  9
 10  1.25  8.8  11
 12  1, (1.5), 1.25  10.5  14
 14  1.5  12.5  16
 15  1  14  17
 16  1.5  14.5  18
 17  1  15.5*  19
 18  1.5  16.5  20
 20  1, 1.5  18.5  22
 22  1.5  20.5  24
 24  2  22  26
 25  1.5  23.5  27
 27  2  25  30
 30  1.5, 2  28  33
 33  2  31  36
 35  1.5  32*  38
 36  2  33  39
 39  2  36  42
 40  1.5  37*  43
 42  2  39  45
 45  1.5  42  48
 48  2  45  52
 50  1.5  46*  54
 55  1.5  51*  60
 56  2  52  62
 60  1.5  56  66
 64  2  60  70
 65  1.5  61*  71
 70  1.5  64*  76
 72  2  66  78
 75  1.5  69*  82
 80  1.5, 2  74  86
 85  2  79  91
 90  2  84  96
 95  2  89  101
 100  2  94  107
 105  2  97*  112
 110  2  100*  117
 120  2    
 130  2    
 140  2    
 150  2    
 160  3    
 170  3    
 180  3    
 190  3    
 200  3    
( ) Only for wheel studs and nuts  * Approximated Values