MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts in an environmentally sealed insert. With an operating temperature range of -65 °C to 200 °C, they offer reliable performance in extreme conditions. Available in various shell sizes and insert arrangements, these connectors come in high-strength aluminum shells with a choice of plating options, including cadmium-free finishes. The series includes front and rear wall mount, jam nut receptacles, and RFI grounding plugs, all meeting military specification MIL-DTL-38999 I. Utilizing M39029 rear release crimp contacts, they ensure secure connections in demanding applications. Suitable for M-rated service, these connectors provide conductive conductivity and ingress protection, making them ideal for critical military and aerospace systems.