The MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts in an insert. With a wide operating temperature range of -65°C to 200°C, these connectors are ideal for demanding applications. Available in various mounting options such as front and rear wall mount, jam nut, and box mount receptacles, they offer flexibility in installation. The connectors come in 9 shell sizes and 52 insert arrangements, accommodating M39029 rear release crimp contacts. Constructed with aluminum shells and offering multiple plating options including gold, electroless nickel, and cadmium-free finishes, they ensure durability and reliability. Compliant with military specification MIL-DTL-38999 II, these connectors are suitable for use in military and aerospace applications requiring secure and high-performance electrical connections.