MIL-DTL-38999 Series I connectors offer high-performance connectivity with up to 128 contacts in an environmentally sealed insert. Designed for harsh environments, they feature front wall mount, rear wall mount, and jam nut receptacles, along with RFI grounding plugs. Compliant with military specifications, these connectors come in 9 shell sizes and 52 insert arrangements, utilizing M39029 rear release crimp contacts. Constructed with high-strength aluminum shells, they are available in various plating options, including cadmium-free finishes. With a wide operating temperature range from -65 °C to 200 °C, these connectors are ideal for demanding applications requiring reliability and durability.