The Amphenol ICC BERGSTIK II 79821-110HLF is a 10-position dual-row unshrouded male header in the board-to-board style, designed for through-hole solder termination on 0.100" (2.54 mm) pitch. Push-pull fastening holds the mating half without hardware — the connector seats and releases by hand, which works well for test fixtures and prototype boards where反复 mating is routine. Each of the two rows carries five contacts; all 10 positions are loaded. Contacts are square-pin phosphor bronze finished in gold or Gold GXT at 30.0 µin (0.76 µm), rated 5 A per contact and 110 V. The black nylon housing meets UL94 V-0.
At 0.100" pitch this is the classic Arduino/Shield-era footprint with 2.54 mm routing and space for standard via sizes. The post extends 0.200" (5.08 mm) below the shoulder, and the total contact length of 0.730" (18.54 mm) accommodates typical board thickness without bottoming out.