MIL-DTL-38999 Series I connectors offer robust connectivity with up to 128 contacts in a secure insert, ideal for harsh environments. These environmentally sealed connectors boast a wide operating temperature range of -65 °C to 200 °C, ensuring reliability in extreme conditions. Available in various shell sizes and insert arrangements, they feature front wall mount, rear wall mount, and jam nut receptacles, as well as RFI grounding plugs. Constructed with high-strength aluminum shells and offering multiple plating options, including RoHS-certified finishes, they provide versatility and durability. With M39029 rear release crimp contacts, these connectors guarantee efficient and secure connections, making them essential for military and industrial applications.