METRIC THREAD PITCH DIAMETER CHART


Metric thread pitch diameter chart according to ISO 262 standard.

Metric Thread Pitch Diameter Chart
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