MIL-DTL-38999 Series II connectors offer robust connectivity with up to 128 contacts in an insert, designed for harsh environments. Featuring various mounting options like front and rear wall mount, jam nut, and box mount receptacles, they ensure secure installations. Available in 9 shell sizes and 52 insert arrangements, these connectors use M39029 rear release crimp contacts for reliable performance. Crafted from durable aluminum with plating options including cadmium and nickel, they guarantee long-lasting protection. With a wide operating temperature range of -65 °C to 200 °C, these connectors are ideal for military and aerospace applications requiring high reliability in extreme conditions.