MIL-DTL-38999 Series II connectors are designed for harsh environments, offering up to 128 contacts in an insert. With a wide operating temperature range of -65 °C to 200 °C, they provide reliable performance in extreme conditions. These connectors come in various styles, including front and rear wall mount, jam nut, and box mount receptacles. Featuring thin walls and restricted lengths, they are ideal for space-constrained applications. Available in 9 shell sizes and 52 insert arrangements, they use M39029 rear release crimp contacts for secure connections. The aluminum shells can be plated with options like cadmium, nickel, or anodized finishes, with RoHS-certified cadmium-free alternatives. Perfect for military and industrial use, these connectors ensure durable and efficient electrical connections.