The TE Connectivity (TE) D38999/33F17R is a circular MIL spec connector designed for use in high reliability aerospace and military applications. It is composed of a shell and coupling nut with 17 gold-plated contacts and features a durable stainless steel shell for the most rigorous environments. The D38999/33F17R offers excellent sealing for high vibration, extreme weather, dust and liquid immersion. The coupling nut is designed to provide secure connection with cyclic unlock/lock and two twist lock points. It has IP67 waterproofing, immunity to EMI/RFI, and meets MIL-DTL-38999 standards. This connector is suitable for use in applications such as avionics, inertial Navigation, ground support and launch systems, missile, and satellite systems.