It uses a 0.100" (2.54mm) pitch on both rows and contacts, with the same 0.100" row spacing — a standard grid that matches legacy perf-board and common IDC socket footprints.
The 64 loaded positions match a 64-circuit BOM line — all positions are filled, so no depopulation to account for.
Mating and Application Context
As an unshrouded male header, the 68405-164HLF mates with any standard 0.100" pitch dual-row female socket or IDC receptacle that accepts 0.025" square pins — the BergStik series itself has matching female headers, and the footprint is cross-compatible with many industry-standard 2.54 mm grid connectors. This is typical for internal board-to-board connections where the assembly is enclosed and not subject to vibration or cable strain.