This is the DHK Inner Hinge Pins 3x55mm (2-pcs) for the Sportra Sedan (8381-735) and other specified DHK models.
SPECIAL NOTE ON THIS PART: Some newer model versions, including the Zombie 8e, no longer use the threaded buttonhead screw, part 8381-727. Rather, they use this part, 8381-735, which is a solid shaft.