3/4" NPT

3/4"  NPT  Tap - Taper Threads.
 
  14 tpi Standard NPT pitch  140mm Overall, 30mm Cutting Length, 22mm Shank and 18mm Square Drive.  5 Flutes, Centred Both Ends. HSS-E 
 
  Genuine Titex Plus from Walter Carbide. Premium German made toolin'
  Minimum use and pristine.