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Drill Sizes

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mjpienaar(at)shaw.ca
Guest

Posted: Wed Nov 11, 2009 10:51 pm Post subject: Drill Sizes

Found this chart on what drill to use for bolts and  rivets, I think it was from the RV community

  

                    

Drill Size<?xml:namespace prefix = o ns =        "urn:schemas-microsoft-com:office:office"      />            

Decimal

(inch)            

Common Use               

1/16            

0.0625            

Holes for safety wire               

3/32            

0.0938            

Pilot holes before final drilling to        #40               

40            

0.0980            

Holes for 3/32" rivets               

1/8            

0.1250            

Pilot holes before final drilling to        #30               

30            

0.1285            

Holes for 1/8" rivets               

27            

0.1440            

Holes for #6 screws               

5/32            

0.1562            

Pilot holes before final drilling to        #21               

21            

0.1590            

Holes for 5/32" rivets               

19            

0.1660            

Holes for #8 screws               

3/16            

0.1875            

Pilot holes before final drilling to #12, #11, or        #10               

12            

0.1890            

Holes for 3/16" rivets               

11            

0.1910            

Holes for 3/16" bolts               

10            

0.1935            

Holes for 3/16" bolts in UHMW        plastic               

1/4            

0.2500            

Holes for 1/4"  bolts

  

  

 Hope you find it helpful

  

 Regards

  

 Mike

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