MIL-DTL-38999 Series II connectors are built for robust performance in harsh environments, boasting up to 128 contacts in an insert. These connectors offer reliable connectivity with their front wall mount, rear wall mount, jam nut, rear box mount, and front box mount receptacles. Available in various shell sizes and insert arrangements, they feature M39029 rear release crimp contacts in sizes 22D, 22M, 22, 20, 16, and 12. With a durable aluminum shell and options for plating including electroless nickel, these connectors ensure longevity and performance. Operating smoothly in temperatures ranging from -65 °C to 200 °C, they meet stringent military specifications for quality and reliability, making them ideal for demanding applications in aerospace, defense, and industrial settings.