MIL-DTL-38999 Series I connectors feature up to 128 contacts in an environmentally sealed insert, designed for harsh environments with an operating temperature range of -65 °C to 200 °C. This connector family offers front and rear wall mount as well as jam nut receptacles, with RFI grounding plugs available. With 9 shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts in various sizes. Constructed with high-strength aluminum shells, they come with multiple plating options, including cadmium-free finishes. These connectors, meeting military specification MIL-DTL-38999 I, are suitable for demanding applications requiring reliable performance in challenging conditions.