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. Available in various shell sizes and insert arrangements, they offer versatility for different applications. These connectors come with wall mount options including front, rear, and jam nut receptacles, along with RFI grounding plugs. Utilizing M39029 rear release crimp contacts, they ensure secure connections. Constructed with high-strength aluminum shells and offering multiple plating options, including cadmium-free finishes, they meet RoHS compliance standards. With a bayonet coupling design and gold contact plating, they ensure reliable performance in military and industrial settings, making them suitable for applications requiring durability and conductivity.