The Amphenol 78511-106HLF is a 6-position unshrouded male pin header from the BERGSTIK® II series, arranged in a single row on the standard 0.100" (2.54mm) pitch. It's a through-hole, board-to-board interconnect — the kind of general-purpose header you see on development boards, test fixtures, and internal wiring where the mating receptacle provides the alignment. The contacts are phosphor bronze with 30.0µin (0.76µm) gold on the mating surface, rated for 5 A per circuit at 110 V.
The 0.100" pitch is the breadboard-standard spacing — it mates with any 0.1"-grid receptacle or IDC socket, and the board footprint is a straight row of 6 through-holes on 2.54mm centres.
It's RoHS compliant per the manufacturer.