The MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts in a sealed insert with an operating temperature range of -65 °C to 200 °C. Available in various mounting options including front and rear wall, jam nut, and box mounts, these connectors offer versatility in installation. With 52 insert arrangements and M39029 rear release crimp contacts, they provide reliable connectivity for aerospace and military applications. Constructed with aluminum shells and offering plating options like gold, electroless nickel, and cadmium finishes, they ensure durability and performance. Meeting MIL-DTL-38999 II specifications, these connectors are ideal for demanding environments requiring secure and efficient electrical connections.