Tap and Drill Sizes
for
METRIC
Click here for USS and SAE

Drill Sizes for Taps

Screw Size

Pitch
(distance in MM  between thread peaks) 

Drill
Size
Extra
Fine
Fine
Thread
Coarse
Thread
3mm   .50   #40
3mm     .60 3/32"
4mm   .70   1/8"
4mm     .75 1/8"
5mm   .80   11/64"
5mm     .90 #20
6mm   1.00   13/64"
7mm   1.00   15/64"
8mm   1.00   F
8mm     1.25 17/64"
9mm   1.00   5/16"
9mm     1.25 5/16"
10mm 1.00     23/64"
10mm   1.25   S
10mm     1.50 11/32"
11mm   1.50   3/8"
12mm 1.25     27/64"
12mm   1.50   13/32"
12mm     1.75 27/64"
14mm 1.25     33/64"
14mm   1.50   1/2"
14mm     2.00 15/32"
16mm   1.50   37/64"
16mm     2.00 35/64"
18mm 1.50     21/32"
18mm   2.00   5/8"
18mm     2.50 39/64"
 

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2002 M.R. Frentz
Last update: March 18, 2008 05:16 PM
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