MIL-DTL-38999 Series I connectors offer high-performance connectivity with up to 128 contacts in an environmentally sealed insert. Designed for harsh environments, these connectors feature front and rear wall mount options, as well as jam nut receptacles with RFI grounding plugs. With a wide operating temperature range from -65 °C to 200 °C, they ensure reliable performance in extreme conditions. The connectors come in 9 shell sizes and 52 insert arrangements, accommodating various contact types. Constructed with high-strength aluminum shells and available in different plating options, including RoHS-certified finishes, they meet stringent military specifications. Suitable for demanding applications, these connectors provide secure and durable electrical connections in aerospace, defense, and industrial settings.