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 versatility for different applications. The connectors come in high-strength aluminum shells with options for plating, including cadmium-free finishes. With front wall mount, rear wall mount, and jam nut receptacles, as well as RFI grounding plugs, they provide reliable connectivity in demanding conditions. Utilizing M39029 rear-release crimp contacts, these connectors are ideal for military and aerospace applications, meeting MIL-DTL-38999 I specifications.