The FCI Amphenol 67998-426HLF is a 26-position, dual-row BERGSTIK® II unshrouded header designed for board-to-board interconnects on a standard 0.100" (2.54mm) pitch grid. It sits as the 26-circuit member of the BERGSTIK II family, a workhorse square-pin header line used for parallel PCB stacking, daughtercard connections, and prototyping on perfboard layouts. Key specs include a 5A per-contact current rating, 110V voltage rating, tin-on-tin contact finish (100.0µin on the mating side), and a UL94 V-0 black thermoplastic housing.
Unshrouded means the 26 square pins are fully exposed — there is no plastic shroud to guide the mating receptacle. The board layout must account for the exposed pins, and the mating half needs its own polarization (typically a shrouded receptacle housing) to prevent misalignment during assembly.