What Is Metric Tap

Thread size is the number of Threads Per Inch (TPI) which is measured along the length of the tap. Metric sizes are referred to as thread pitch. … Both the chamfered portion of the tap and the first full thread beyond the chamfer produce the finished thread of the part.

What are metric tap sizes?

TapMetric DrillUS Drill5mm x 0.84.3mm-6mm x 1.05.2mm-7mm x 1.06.1mm15/64″8mm x 1.256.9mm17/64″

How are metric taps measured?

The metric system uses the thread pitch, which is the distance between threads, measured in millimeters. For each thread count, the equivalent thread pitch is provided and for metric taps, the approximate thread count is shown based on the pitch.