MIL-DTL-38999 Series I connectors offer robust connectivity with up to 128 contacts in an insert, designed for harsh environments. Featuring front wall mount, rear wall mount, and jam nut receptacles, these connectors ensure secure installations. With a wide operating temperature range of -65 °C to 200 °C, they are suitable for demanding applications. The connectors come in 9 shell sizes and 52 insert arrangements, accommodating various contact types including M39029 rear release crimp contacts. Constructed with high strength aluminum shells and available in different plating options such as electroless nickel and cadmium finishes, they provide reliable performance. Meeting stringent military specifications, these connectors are ideal for aerospace, defense, and industrial applications requiring durable and environmentally sealed connectivity.