MIL-DTL-38999 Series I connectors feature up to 128 contacts in an environmentally sealed insert, designed for harsh environments with an operating temperature range of -65 °C to 200 °C. Offering front and rear wall mount options, as well as jam nut receptacles and RFI grounding plugs, these connectors come in 9 shell sizes and 52 insert arrangements. Utilizing M39029 rear release crimp contacts in various sizes, they ensure reliable connectivity. Constructed with high-strength aluminum shells and available in different plating options, including RoHS-certified finishes, these connectors meet stringent military specifications for durability and performance. Suitable for applications requiring reliable electrical connections in challenging conditions, they provide conductivity and ingress protection while ensuring longevity with 500 mating cycles.