MIL-DTL-38999 Series II connectors feature up to 128 contacts in an insert, designed for harsh environments with an operating temperature range of -65°C to 200°C. Available in various configurations including front and rear wall mount, jam nut, and box mount receptacles, they offer versatility for different applications. These connectors come in 9 shell sizes and 52 insert arrangements, utilizing M39029 rear release crimp contacts. Constructed with aluminum shells, they offer durability and reliability. Plating options include cadmium and nickel finishes, with RoHS certified cadmium-free options available. With a focus on performance and longevity, these connectors are ideal for military and industrial use.