Tapping a 7/16" X 20 TPI thread into 1/2" mild steel
Use a starter tap (tapered at the tip) to make most of the threads then use a bottom tap ( very little taper on the end) to finish when tapping a blind hole.
Left - starter tap Right - bottom tap
10 Different Types of Thread Taps [Definitive Guide]
Use a starter tap (tapered at the tip) to make most of the threads then use a bottom tap ( very little taper on the end) to finish when tapping a blind hole.
Left - starter tap Right - bottom tap
10 Different Types of Thread Taps [Definitive Guide]
