M39012/28-0503 is a bulkhead jack connector assembly designed for panel-mount applications. The product features a 76-28 UNEF-2A threaded stud with a maximum panel thickness of 241 mils (approximately 6.12 mm). The connector incorporates multiple contact points spaced at 5.59 mm intervals. This bulkhead jack is manufactured to specification KER 10504 and is suitable for applications requiring secure panel-mounted electrical connections in aerospace and industrial equipment.