The MIL-DTL-38999 Series II connectors offer reliable connectivity in harsh environments, with up to 128 contacts housed in an environmentally sealed insert. Operating between -65 °C and 200 °C, these connectors come in various configurations such as front and rear wall mounts, jam nuts, and box mounts. Available in 9 shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts for secure connections. Constructed with aluminum shells and offering plating options like gold and electroless nickel, they ensure durability and conductivity. With RoHS compliant finishes, these connectors are ideal for military and industrial applications requiring rugged performance.