How do you cut a thread on a steel round bar?

To cut a thread on a steel round bar, start by selecting the appropriate tap or die for the desired thread size and type. Secure the bar in a vise or lathe to ensure stability. If using a die, place it at a right angle to the bar's surface and turn it clockwise, applying cutting oil to reduce friction. For a tap, drill a pilot hole first, then insert the tap and turn it while applying steady pressure to create the thread.