MIL-DTL-38999 Series II connectors feature up to 128 contacts within an insert, designed for harsh environments with operating temperatures ranging from -65 °C to 200 °C. Offering various mounting options including front and rear wall mount, jam nut, and box mount receptacles, they ensure secure connections in demanding applications. Available in 9 shell sizes and 52 insert arrangements, these connectors use M39029 rear release crimp contacts for reliable performance. Built with aluminum shells and plated with options like electroless nickel and cadmium finishes, they meet stringent military specifications. With RoHS compliant versions available, these connectors guarantee both durability and environmental responsibility. Ideal for aerospace, defense, and industrial applications, they provide a high level of connectivity assurance.