MIL-DTL-38999 Series II connectors feature up to 128 contacts in an insert, designed for harsh environments with an operating temperature range of -65 °C to 200 °C. Available in various mounting styles like front wall, rear wall, jam nut, and box mount receptacles, these connectors offer versatility in applications. With 52 insert arrangements and M39029 rear release crimp contacts, they ensure secure connections. Constructed with aluminum shells and multiple plating options, including cadmium-free finishes, these connectors meet stringent military specifications for reliability. Suitable for use in demanding environments, they provide durability and performance, making them ideal for aerospace, defense, and industrial applications.