MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts in an insert. These environmentally sealed connectors have a wide operating temperature range of -65°C to 200°C. Available in various mounting styles including front and rear wall mount, jam nut, and box mount receptacles, they offer versatility in installation. The plugs, offered in straight, RFI grounding, and standard configurations with a 90-degree cable clamp, ensure secure connections. With 9 shell sizes and 52 insert arrangements, they accommodate different contact sizes, including M39029 rear release crimp contacts. Constructed with aluminum shells and various plating options such as gold, electroless nickel, and cadmium-free finishes, they meet diverse application needs. RoHS compliance further ensures environmental responsibility. Suitable for military and industrial applications, these connectors guarantee reliable performance in demanding conditions.