The 1-172167-2: It uses a 0.163" (4.14mm) pitch and a latch lock for positive retention in free-hanging (in-line) wire-to-wire or wire-to-board harnesses.
The housing accepts either gender, so the same shell works for both plug and receptacle sides depending on which terminal you load.
The latch lock snaps audibly on full mate, giving a vibration-resistant connection. The 2-row, 4-position layout means two circuits per row at 4.14mm row spacing.
