MIL-DTL-38999 Series II connectors are designed for rugged environments, featuring up to 128 contacts in a sealed insert. With a wide operating temperature range of -65 °C to 200 °C, these connectors offer reliable performance in harsh conditions. Available in various mounting options such as front and rear wall mount, jam nut, and box mount receptacles, they cater to diverse application needs. The connectors come in 9 shell sizes and 52 insert arrangements, with M39029 rear release crimp contacts for secure connections. Crafted from aluminum, they are offered in different plating finishes including cadmium-free options. These connectors, meeting military specification MIL-DTL-38999 II, are ideal for demanding environments requiring durability and performance assurance.