9-Contact, Size SK Aluminum Shell Box-Mount Receptacle Connector, featuring 9 independent size 16 silver-plated solder-pot female socket contacts encased inside a chemical-resistant and corrosion-resistant high-insulation diallyl phthalate insulator insert block. Operating as a high-reliability bulkhead mount grounding and power hub, it establishes a true phase-stable interface to coordinate heavy-duty multi-conductor instrumentation tracks, multi-phase machinery drops, and power transmission lines smoothly through chassis metal panel cutouts without creating electrical cross-talk or high-voltage arc-tracking failures. It delivers excellent dimensional stability under intensive kinetic torque, persistent factory floor workloads, and severe machinery vibration paths, housed in a standard box-mount flanged circular square casing layout equipped with 4 integrated panel-mounting holes. Originally engineered by ITT Cannon (and subsequently supported within the Sure Seal Connections / PEI-Genesis Standard-K® industrial connector sequence)