|Threads Per Inch:
|Imperial - BSP
Taps are tools used by engineers for creating a female thread inside a hole. The tap is inserted into a special wrench and turned whilst cutting oil is used to lubricate the tap.
When forming a brand new thread in a blind hole, it is usually a three-stage process.
When cutting shallow female threads, it may be possible to skip the third stage and just use the taper or second taps.
If tapping into a soft material it is possible to cut the thread with only a second tap.