The MIL-DTL-38999 Series II connectors are designed for harsh environments, offering up to 128 contacts in an insert for robust connectivity. With a wide operating temperature range of -65 °C to 200 °C and environmental sealing, they ensure reliable performance in demanding conditions. Available in various configurations, including front and rear wall mount, jam nut, and box mount receptacles, these connectors feature bayonet coupling for secure mating. Constructed with aluminum shells and offering multiple plating options, including RoHS compliant finishes, they provide durability and corrosion resistance. Utilizing M39029 rear release crimp contacts in various sizes, these connectors are suitable for military and aerospace applications.