METRIC THREAD PITCH CHART FOR GENERAL ENGINEERING USE


Thread pitch chart for metric screw sizes used in general engineering. This chart is prepared according to screw data given in the ISO 262:1998 standard.

Nominal Diameter (D,d) Pitch (P)
1st choice 2nd choice coarse fine
M1.6   0.35    
  M1.8 0.35    
M2   0.4    
M2.5   0.45    
M3   0.5    
  M3.5 0.6    
M4   0.7    
M5   0.8    
M6   1    
  M7 1    
M8   1.25 1  
M10   1.5 1.25 1
M12   1.75 1.5 1.25
  M14 2 1.5  
M16   2 1.5  
  M18 2.5 2 1.5
M20   2.5 2 1.5
  M22 2.5 2 1.5
M24   3 2  
M30   3.5 2  
M36   4 3  
M42   4.5 3  
M48   5 3  
M56   5.5 4  
  M60 5.5 4  
M64   6 4  
Selected metric sizes for general engineering use

Reference:

  • ISO 262:1998 (E) -  ISO general purpose metric screw threads — Selected sizes for screws, bolts and nuts