MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts in an insert with environmental sealing. Operating between -65 °C and 200 °C, they offer durability and reliability. Available in various shell sizes and insert arrangements, these connectors utilize M39029 rear release crimp contacts. Constructed with high-strength aluminum shells, they come in plating options like cadmium and electroless nickel. With bayonet coupling and straight plug design, they ensure secure connections. Suitable for military applications, these connectors provide 500 mating cycles and are environmentally resistant. RoHS compliant options are also available.