NAG FASTMAN (High Speed Steel) Taps are available in three different styles which can be used individually or in combinations depending on the application.

Roughing Taps
Provides full diameter thread and has 5 taper leads.

Finishing (Plug) Taps
Provides full diameter thread and has 3½ taper leads. Finishing taps are the most commonly used taps for tapping through holes.

Bottoming Taps
Provides full diameter thread to the bottom of blind holes since tap has only 1½ lead threads.