The Amphenol FCI DC37P065TXLF is a 37-position D-sub plug with male pins, shell size 4 (DC, C), terminated via solder cups for free-hanging in-line cable assemblies.
The DC37P064TXLF and DC37P064HTXLF carry flash gold, which is adequate for low-cycle or permanent-install signal lines but will wear through faster under repeated mate/unmate cycles. The 30.0 µin thickness here is rated for higher reconnect duty — think test equipment, field-service cables, or any harness that gets disconnected and reconnected regularly.