MIL-DTL-38999 Series I connectors offer high-performance connectivity with up to 128 contacts in a rugged, environmentally sealed design. Operating efficiently in extreme temperatures ranging from -65 °C to 200 °C, these connectors are ideal for harsh environments. Featuring front wall mount, rear wall mount, and jam nut receptacles, they ensure versatile installation options. With 52 insert arrangements and M39029 rear release crimp contacts in various sizes, including coax and twinax, these connectors deliver reliable connectivity. Constructed with high-strength aluminum shells, they come in a range of plating options such as cadmium and nickel for enhanced durability. Meeting military specification MIL-DTL-38999 I, these connectors guarantee performance and longevity in demanding applications.