The MIL-DTL-38999 Series II connectors offer reliable performance in harsh environments, featuring up to 128 contacts in an environmentally sealed insert. With a wide operating temperature range from -65°C to 200°C, these connectors are ideal for demanding applications. Available in various configurations including front and rear wall mount, jam nut, and box mount receptacles, they cater to diverse installation needs. The connectors come in 9 shell sizes and 52 insert arrangements, accommodating M39029 rear release crimp contacts in multiple sizes. Constructed with durable aluminum shells and offering plating options such as gold, electroless nickel, and cadmium-free finishes, they ensure long-lasting durability and performance. Compliant with MIL-DTL-38999 II military specifications, these connectors are suitable for use in critical situations where reliability is paramount.