MIL-DTL-38999 Series II connectors offer reliable connectivity in harsh environments, featuring up to 128 contacts sealed for environmental protection. Operating between -65 °C and 200 °C, these connectors come in various configurations including front and rear wall mount, jam nut, and box mount receptacles. With options like straight, RFI grounding, and standard plugs, they accommodate diverse applications with ease. Available in 9 shell sizes and 52 insert arrangements, these connectors utilize M39029 rear release crimp contacts for secure connections. Constructed with aluminum shells and plated in finishes like electroless nickel and cadmium, they ensure durability and performance. The Series II connectors, compliant with MIL-DTL-38999 specifications, are essential components for demanding environments requiring reliable electrical connections.