The MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts in an insert. With a wide operating temperature range of -65 °C to 200 °C, these connectors offer reliable performance in extreme conditions. Available in various shell sizes and insert arrangements, they come in high-strength aluminum shells with multiple plating options, including cadmium-free finishes. Offering front wall mount, rear wall mount, and jam nut receptacles, as well as RFI grounding plugs, these connectors are ideal for military and aerospace applications. Utilizing M39029 rear release crimp contacts, they ensure secure and efficient connections. With their bayonet coupling design and environment-resistant construction, the MIL-DTL-38999 Series I connectors provide durability and reliability in demanding environments.