Nut taps HSSE-V ( 3%V )
    High alloyed steels
    Rm = 1,000 - 1,200 N/mm²
       ( 30 - 40 HRC / 300 - 385 HB /
        135,000 - 185,000 PSI )

   Handtap No. 1 with pilot guide, to assure
   the concentric start at manual threading.

   Tapping only 3-4 threads is enough.
   3 thread chamfer lead.
   Rake angle 1° - 3°.

   Handtap No. 2 with the same thread
   sizes as A648/1.

   3 thread chamfer lead.
   Rake angle 1° - 3°.

   Handtap No. 3 that finishes the thread to
   the required tolerance.

   Not suitable to use as single pass tap.
   3 thread chamfer lead.
   Rake angle 1° - 3°.

   Handtap set consisting of 3 taps:

   A648 = A648/1 + A648/2 + A648/3.

   You must tap continuously, it means
   without stop and reversing the tap to
   break the chip.