MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts in an insert. These circular connectors are environmentally sealed, with an impressive operating temperature range of -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, these connectors are suitable for diverse installation needs. Utilizing M39029 rear release crimp contacts, they ensure reliable connectivity. Meeting military specification MIL-DTL-38999 I, these connectors are ideal for demanding environments where durability and performance are essential.