MIL-DTL-38999 Series II connectors offer high-performance connectivity with up to 128 contacts in a durable, environmentally sealed insert. Designed for harsh environments, these connectors feature various mounting options, including front and rear wall mount, jam nut, and box mount receptacles. Available in 9 shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts for secure connections. The aluminum shells come in a range of plating options, including cadmium-free finishes, ensuring reliable performance. With a wide operating temperature range of -65 °C to 200 °C, these connectors are ideal for military and industrial applications requiring rugged and dependable connectivity.