The MIL-DTL-38999 Series II connectors feature up to 128 contacts in an environmentally sealed insert, designed for harsh environments with an operating temperature range of -65°C to 200°C. Available in various mounting styles including front and rear wall mount, jam nut, and box mount receptacles, they offer versatility in installation. These connectors come in 9 shell sizes and 52 insert arrangements, utilizing M39029 rear release crimp contacts for secure connections. Constructed with aluminum shells and offered in different plating options such as cadmium and nickel, they ensure durability and reliability in military and industrial applications. With gold-plated contacts and RoHS compliant finishes, they guarantee excellent conductivity and environmental compliance. Perfect for demanding environments, these connectors meet the stringent requirements of MIL-DTL-38999 II specifications.