MIL-DTL-38999 Series I connectors feature up to 128 contacts within an insert, providing durable and environmentally sealed connectivity for harsh environments. Designed for versatility, these connectors offer front wall mount, rear wall mount, and jam nut receptacles, along with RFI grounding plugs. With a wide range of shell sizes and insert arrangements, they accommodate various applications and use M39029 rear release crimp contacts in multiple sizes. Constructed with high-strength aluminum shells, they come in a selection of plating options, including cadmium-free finishes. Operating efficiently in temperatures ranging from -65 °C to 200 °C, these connectors ensure reliable performance in demanding conditions.