90 degree
60 degree
30 degree
120 degree
The thread angle of a metric thread is 60 degree.
Tap
Die
Drillbit
Reamer
The tool used to cut external threads is known as Die.
First Tap
Bottoming Tap
Taper Tap
Intermediate Tap
The shank of a hand tap has three rings marked on. Then it is a Bottoming Tap