The kinked pin solder tail (0.110" post length, 0.505" overall) provides retention during wave-solder and through-hole assembly — the kink acts as a standoff, holding the header flush against the board during reflow.
Tin Plating at 150 µinch — Field-Service Durability
That thickness — well above the 40-80 µinch flash tin found on economy headers — gives the contact good fretting resistance for moderate mating cycles.
No official pin-compatible successor or cross-reference exists from TE — this is the current production part number for the 9-position unshrouded MTA-100 header.