The MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts in an insert. With a wide operating temperature range of -65 °C to 200 °C, these connectors are ideal for demanding applications. Available in various mounting styles such as front and rear wall mount, jam nut, and box mount receptacles, they offer versatility in installation. The connectors come in aluminum shells with options for plating including electroless nickel and cadmium finishes. Utilizing M39029 rear release crimp contacts, they ensure reliable connections. Meeting military specification MIL-DTL-38999 II, these circular connectors are rugged and reliable for use in aerospace, defense, and other industries requiring high-performance connectivity solutions.