The MIL-DTL-38999 Series II connectors are designed for harsh environments, offering up to 128 contacts in an environmentally sealed insert. With an operating temperature range from -65°C to 200°C, these connectors are reliable in extreme conditions. Featuring various mounting options including front and rear wall mount, jam nut, and box mount receptacles, they provide flexibility in installation. 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 with options like electroless nickel, they ensure durability and conductivity. With RoHS-certified cadmium-free finishes, these connectors meet environmental standards. Perfect for military and industrial applications, they guarantee high performance and longevity.