MIL-DTL-38999 Series I connectors feature up to 128 contacts sealed for harsh environments, with an operating range of -65 °C to 200 °C. Available in various shell sizes and insert arrangements, they utilize M39029 rear release crimp contacts. These connectors, compliant with RoHS regulations, come in aluminum shells with plating options like cadmium and nickel. Suitable for military applications, they offer reliable performance with a mating life of 500 cycles. The wall-mounting receptacles and grounding plugs provide secure connections in demanding settings.