MIL-DTL-38999 Series II connectors are designed for demanding environments, featuring up to 128 contacts in an insert. With a wide operating temperature range of -65 °C to 200 °C, these connectors offer versatility and reliability. Available in various mounting styles such as front and rear wall mount, jam nut, and box mount receptacles, they cater to diverse installation needs. The connectors come in 9 shell sizes and 52 insert arrangements, utilizing M39029 rear release crimp contacts for secure connections. Constructed with aluminum shells and offering multiple plating options including gold and electroless nickel, they ensure durability and performance. Meeting stringent military specifications, these connectors are ideal for applications requiring rugged and high-performance connectivity.