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Metric Tap and Drill Bit Size Table

Get the best hardware fasteners from Newport Fasteners store at a great price! Having a good metric tap drill chart is a very handy thing while buying or deciding on the right kind of fasteners for the work. The size recommended in most drill bit size charts is very often not the best size to use. When it comes to tapping drills, one size doesn’t fit all. The threaded percentage needs to be considered you want when you’re done tapping to know about the right drill bit size for your particular tapping application.

The performance of the bit is analyzed with the geometry and sharpening of the cutting edges. For most applications, you can get longer tap tool life and a lower likelihood of breaking a tap off in the hole by using a lower percentage of thread. For hard or tough materials, a lower percentage can really help tap life and those materials have lots of strength even at the lower percentages. Evaluate our metric tap drill chart to know more details about the right fit hardener for the job.

Get details about the tap drill metric and measurement from the chart. We recommend the chart for all industries looking for the right kind of information about tap drills.

Tap Metric Drill US Drill
3mm x 0.5 2.5mm -
4mm x 0.7 3.4mm -
5mm x 0.8 4.3mm -
6mm x 1.0 5.2mm -
7mm x 1.0 6.1mm 15/64"
8mm x 1.25 6.9mm 17/64"
8mm x 1.0 7.1mm -
10mm x 1.5 8.7mm -
10mm x 1.25 8.9mm 11/32"
10mm x 1.0 9.1mm -
12mm x 1.75 10.5mm -
12mm x 1.5 10.7mm 27/64"
14mm x 2.0 12.2mm -
14mm x 1.5 12.7mm -
16mm x 2.0 14.2mm 35/64"
16mm x 1.5 14.7mm -
Drill sizes are for 75% depth of thread.