In Which Thread The Thread Angle Is 60 Degree?

In Which Thread The Thread Angle Is 60 Degree? Name Code Angle Whitworth threads W 55° British standard pipe thread G 55° National Pipe ThreadNPT 60° Knuckle thread Round thread Rd 30° Are all threads 60 degrees? The angle of this “V” is called the thread angle, and is determined by fastener engineers. Most screw