MIL-DTL-38999 Series II connectors are designed for harsh environments, offering up to 128 contacts in an insert. These connectors are environmentally sealed and have a wide operating temperature range from -65°C to 200°C. Featuring various mounting options like front wall mount, rear wall mount, jam nut, and more, they provide versatile connectivity solutions. With 9 shell sizes and 52 insert arrangements available, they accommodate different contact sizes and configurations. Made of aluminum, these connectors come with plating options including electroless nickel and cadmium finishes. Their EMI/RFI shielding capability, along with RoHS compliance, ensures reliable performance in demanding applications. The connectors, meeting MIL-DTL-38999 II specifications, are ideal for military and aerospace use, offering durability and conductivity in extreme conditions.