The 70551-0043 is a Molex SL series right-angle pin header with a latching mechanism and a split peg for board retention. The '15 SA' in the description indicates a 15-circuit count — a common size for wire-to-board interconnects in control panels and industrial I/O modules. This header mates with SL crimp receptacle housings, forming a keyed, latching pair that resists accidental disconnection.
The part ships in a box package.