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 from -65 °C to 200 °C. Available in various shell sizes and insert arrangements, they offer front wall mount, rear wall mount, and jam nut receptacles, along with RFI grounding plugs. Crafted from high-strength aluminum with options for plating such as cadmium and nickel, these connectors ensure durability and reliable performance. Utilizing M39029 rear release crimp contacts, they are ideal for military and aerospace applications, meeting stringent standards for conductivity and ingress protection. RoHS compliant finishes are also available, making them a versatile choice for demanding environments.