MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts in an environmentally sealed insert. With a wide operating temperature range of -65 °C to 200 °C, these connectors are reliable in extreme conditions. Available in various mounting styles including front and rear wall mount, jam nut, and box mount receptacles, they offer versatility in installation. The connectors come in 9 shell sizes and 52 insert arrangements, accommodating different contact sizes for optimal connectivity. Constructed with aluminum shells and offering options for RoHS compliant finishes, they ensure durability and compliance with environmental standards. Perfect for military and industrial applications, these connectors provide secure and high-performance electrical connections.