The MIL-DTL-38999 Series I connectors offer robust connectivity solutions for harsh environments, featuring front wall mount, rear wall mount, and jam nut receptacles with RFI grounding plugs. With up to 128 contacts in an insert, these connectors ensure reliable performance in extreme conditions, operating seamlessly in temperatures ranging from -65 °C to 200 °C. Crafted from high-strength aluminum shells, they come in 9 shell sizes and 52 insert arrangements, accommodating various connection needs. Utilizing M39029 rear release crimp contacts in different sizes, including coax and twinax options, these connectors guarantee secure and efficient electrical connections. Available in multiple plating options, such as electroless nickel and cadmium finishes, they cater to diverse application requirements. Designed for durability, MIL-DTL-38999 Series I connectors are ideal for military and industrial applications where ruggedness and environmental sealing are essential.