MIL-DTL-38999 Series I connectors feature up to 128 contacts in an environmentally sealed insert, designed for harsh environments with an operating range of -65 °C to 200 °C. Available in front wall mount, rear wall mount, and jam nut receptacles, they offer RFI grounding plugs and come in 9 shell sizes with 52 insert arrangements. Utilizing M39029 rear release crimp contacts, these connectors are constructed with high strength aluminum shells and offer various plating options including cadmium-free finishes. Meeting military specification MIL-DTL-38999 I, they ensure reliable performance with gold-plated contact pins, suitable for applications requiring conductivity in challenging conditions.