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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
Metal 3D Printing Design Guide

Direct Metal Laser Sintering (DMLS) 3D printing for parts with reduced cost and little waste.

Mechanical Engineers Outlook

Guide for those interested in becoming a mechanical engineer. Includes qualifications, pay, and job duties.

Injection Molding Design Guide

Guide for high quality and cost-effective plastic injection molding.

CNC Machining Design Guide

Optimize your designs, reduce machining time, and lower your costs.