MIL-DTL-38999 Series II connectors offer high-performance connectivity with up to 128 contacts in a durable, environmentally sealed insert. Designed for harsh environments, they feature various mounting options including wall mount, jam nut, and box mount receptacles. Available in 9 shell sizes and 52 insert arrangements, these connectors utilize reliable M39029 rear release crimp contacts. Constructed with aluminum shells and plated with options like electroless nickel and cadmium finishes, they ensure long-lasting durability. With a wide operating temperature range from -65 °C to 200 °C, along with RoHS compliance for certain finishes, these connectors provide reliable performance in demanding applications.