MIL-DTL-38999 Series I connectors feature up to 128 contacts in an insert, designed for harsh environments with an operating temperature range of -65 °C to 200 °C. Available in various shell sizes and insert arrangements, they offer front and rear wall mount options, as well as jam nut receptacles and RFI grounding plugs. Constructed with high-strength aluminum shells and utilizing M39029 rear release crimp contacts, these connectors ensure reliable performance. Plating options include cadmium-free finishes like electroless nickel, meeting RoHS certification. Perfect for military and aerospace applications, these connectors provide environment-resistant connectivity with a mating life of 500 cycles.