The MIL-DTL-38999 Series II connectors are designed for rugged environments, featuring up to 128 contacts in an insert with environmental sealing. Operating between -65°C and 200°C, these connectors offer reliable performance in harsh conditions. Available in various mounting styles such as front wall, rear wall, jam nut, and box mount receptacles, they cater to diverse applications. The connectors come in aluminum shells with plating options like electroless nickel and cadmium finishes. Utilizing M39029 crimp contacts, they ensure secure connections. With a contact rating of 500 cycles, these connectors are durable and offer conductivity. Meeting military specification MIL-DTL-38999 II, they are ideal for aerospace, defense, and industrial applications requiring high-performance connectivity in demanding environments.