MIL-DTL-38999 Series II connectors feature up to 128 contacts in an environmentally sealed insert, designed to withstand extreme temperatures ranging from -65 °C to 200 °C. These harsh environment connectors come in various configurations including front and rear wall mount, jam nut, and box mount receptacles. Available in 9 shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts for reliable connectivity. Constructed with aluminum shells and offering plating options such as gold, electroless nickel, and cadmium free finishes, these connectors are ideal for military and aerospace applications requiring durability and performance. With a mating type of Bayonet and contact gender of female, they ensure secure and conductive connections. The MIL-DTL-38999 II connectors are suitable for demanding environments, meeting the stringent requirements of military specifications.