MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts in an insert. With environmental sealing and an operating temperature range of -65 °C to 200 °C, they ensure reliable performance in demanding conditions. These connectors come in various configurations such as front and rear wall mount, jam nut, and box mount receptacles, offering versatility in installation. Available in aluminum shells with options for plating including cadmium-free finishes, they meet RoHS certification standards. Utilizing M39029 rear release crimp contacts, these connectors guarantee secure connections. Suitable for military and industrial applications, they provide durability and longevity with a mating life of 500 cycles.