MIL-DTL-38999 Series II connectors are designed for rugged environments, offering up to 128 contacts in a sealed insert. With an impressive operating temperature range of -65 °C to 200 °C, they ensure reliable performance in extreme conditions. Available in various mounting options including front and rear wall mount, jam nut, and box mount receptacles, these connectors feature thin walls and restricted lengths for space-saving installations. Compliant with military specification MIL-DTL-38999 II, they are ideal for applications requiring durability and high performance. Crafted from aluminum with options for RoHS compliant plating, such as electroless nickel and cadmium finishes, these connectors guarantee both strength and environmental safety. Suitable for back panel box mounting, they feature removable crimp contacts in size 22(4) with gold plating for optimal conductivity. The bayonet coupling design ensures secure connections, while the socket contact style and N keyway polarization provide ease of use. With a service rating of M and a service class of E, these connectors are specifically tailored for demanding environments, offering 500 mating cycles and reliable performance in harsh conditions.