DIN5157 BSP Hand Tap Set, 2pcs HSS-G

DIN5157 BSP Hand Tap Set, 2pcs HSS-G
Technical Data:

Standard DIN5157
Material HSS-G/HSS-E
Tolerance ISO2(6H)
HRC 61-66
Surface Bright Finished
Flute Type Straight
Cutting Direction Right
Thread Angle 55°
Square DIN10
Both Ends Flat
Application Internal thread cutting for through and blind holes

Brief Introduction:
Whit worth-threads have a steeper flank compared to metric threads: thread
angle 55° compared to thread angle 60° of metric threads. There is a
distinction between conical and cylindrical types of Whit worth-threads.
Conical threads according to DIN EN 10226-1 (old DIN 2999) are referred to as
metallic sealing. We are Internal Thread Cutting Tool Factory.

The reason for that is that the nominal diameter of a conical thread matches
the mating thread after several turns. By further tightening the pipe, both
threads jam and thus become metallic sealing. Cylindrical threads according to
DIN ISO 228 are not self-sealing. (Abbreviation = G)

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