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Collet Sizes For U.S. Made Metric Taps

Size and Pitch use Collet Size Roud Square

M1.6 x .35 #6 .141 .110  
M1.8 x .35 #6 .141 .110  
M2 x .4 #6 .141 .110  
M2.2 x .45 #6 .141 .110  
M2.5 x .45 #6 .141 .110  
M3 x .5 #6 .141 .110  
M3.5 x .6 #6 .141 .110  
         
M4 x .7 #8 .168 .131  
         
M4.5 x .75 #10 .194 .152  
M5 x .8 #10 .194 .152  
         
M6 x 1.0 1/4 .255 .191  
         
M7 x 1.0 5/16 .318 .238  
M8 x 1.25 5/16 .318 .238  
M8 x 1.0 5/16 .318 .238  
         
M10 x 1.5 7/16,1/2 or 3/8 .323 .242 check tap
M10 x 1.25 7/16,1/2 or 3/8 .323 .242 dimensions
         
M12 x 1.75 1/2 .367 .275  
M12 x 1.25 1/2 .367 .275  
         
M14 x 2. 9/16 .429 .322  
M14 x 1.5 9/16 .429 .322  
         
M16 x 2. 5/8 .480 .360
M16 x 1.5 5/8 .480 .360  
         
M18 x 2.5 11/16 .542 .406  
M18 x 1.5 11/16 .542 .406  
         
M20 x 2.5 13/16 .652 .489  
M20 x 1.5 13/16 .652 .489  
         
M22 x 2.5 7/8 .697 .523  
M22 x 1.5 7/8 .697 .523  
         
M24 x 3.0 15/16 .760 .570  
M24 x 2.0 15/16 .760 .570  
         
M27 x 3.0 1-1/8 .896 .672  
M27 x 2.0 1-1/8 .896 .672

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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