The MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts in an insert for robust connectivity. With front and rear wall mount options, as well as jam nut and box mount receptacles, they offer versatile installation. Operating in temperatures ranging from -65 °C to 200 °C, these connectors are environmentally sealed for reliable performance. Available in various shell sizes and insert arrangements, they utilize M39029 rear release crimp contacts for secure connections. Constructed with aluminum shells and offering plating options such as cadmium and electroless nickel, they ensure durability and RoHS compliance. Suitable for military and industrial applications, these connectors provide efficient EMI/RFI shielding and are ideal for demanding environments.