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 configurations, including front wall mount, rear wall mount, and jam nut receptacles, they offer RFI grounding plugs and utilize M39029 rear release crimp contacts. These connectors come in high strength aluminum shells with options for plating, such as cadmium-free finishes. With RoHS certification, they ensure environmental compliance. Suitable for military and industrial applications, these connectors provide reliable performance with a service rating of I and a mating life of 500 cycles.