5/8" BSP

5/8"  BSP  Tap - For Parallel Threads.
 
  Marked BSPF - BS Pipe Fitting.
  14 tpi Standard BSP pitch
  91mm Overall, 27mm Cutting Length, 18mm Shank and 14mm Square Drive.   4 Flutes, Centred Both Ends.
  2nd Cut (Tapered Start)