MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts in an insert. These connectors are environmentally sealed and can operate in temperatures ranging from -65 °C to 200 °C. Available in various shell sizes and insert arrangements, they offer versatility for different applications. The connectors come in high-strength aluminum shells with options for plating, including cadmium-free finishes. With front wall mount, rear wall mount, and jam nut receptacles, as well as RFI grounding plugs, they provide secure connections. Utilizing M39029 rear release crimp contacts, they ensure reliable performance. The series meets military specification MIL-DTL-38999 I and offers RoHS compliance for environmentally conscious applications.