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, they offer reliable performance in extreme conditions. These connectors come in various configurations, including front and rear wall mount, jam nut, and box mount receptacles. Offering versatility, they are available in 9 shell sizes and 52 insert arrangements, utilizing M39029 rear release crimp contacts. Constructed with aluminum shells, they are plated with options such as electroless nickel and cadmium finishes. RoHS certified options are also available. Suitable for military and industrial applications, these connectors provide durable and secure electrical connections.