Bottom Style: Generate the thread to the bottom of the hole.
Taper Style: Starts the thread square with the workpiece.6875-18 HSS Plug Tap Hand taps are popular for use in general machine tapping or CNC tapping. HSS, Tap, Size: 11/16-18, 11/16" Plug Special Tap Decimal Equivalent: . 11/16"-18 HSS Plug Hand Tap Hand Taps are the most versatile taps for hand use, or for tapping under power.