MIL-DTL-38999 Series II connectors are designed for rugged applications, with up to 128 contacts in an environmentally sealed insert. Operating in extreme temperatures from -65 °C to 200 °C, these connectors offer reliability in harsh environments. Featuring various mounting options like front and rear wall mount, jam nut, and box mount receptacles, they accommodate diverse installation needs. With 52 insert arrangements and M39029 rear release crimp contacts, these connectors ensure secure and efficient connections. Constructed with aluminum shells and plated with options like electroless nickel and cadmium finishes, they meet stringent military specifications. Suitable for demanding environments, these connectors provide durability and performance in critical applications.