MIL-DTL-38999 Series II connectors offer robust performance in harsh environments with up to 128 contacts housed in a sealed insert. Operating between -65 °C and 200 °C, these connectors come in various mounting options such as front and rear wall mount, jam nut, and box mount receptacles. Available in 9 shell sizes and 52 insert arrangements, they use M39029 rear release crimp contacts for secure connections. Constructed with aluminum shells and plated in options like electroless nickel, these connectors meet stringent military specifications for reliability. With features like bayonet coupling, EMI shielding, and RoHS compliance, they ensure durable and efficient connectivity for a wide range of applications.