MIL-DTL-38999 Series I connectors feature up to 128 contacts within an environmentally sealed insert, designed for harsh environments with an operating temperature range of -65 °C to 200 °C. Available in various configurations including front and rear wall mount, jam nut receptacles, and RFI grounding plugs, these connectors offer versatility in military and aerospace applications. With 9 shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts for reliable connections. Constructed with high-strength aluminum shells, they come in a range of plating options, including RoHS certified finishes, ensuring durability and performance. Suitable for box mounting and back panel applications, their bayonet coupling design and gold-plated contacts guarantee secure and efficient connectivity in demanding environments.