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 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. They are MIL-DTL-38999 I compliant, suitable for military and aerospace use, and offer reliable performance with a mating life of 500 cycles. With multiple mounting options like wall mounting flange and jam nut receptacles, they provide flexibility in installation. The contact plating is gold, ensuring excellent conductivity, and they meet environmental resistance standards. These connectors are ideal for demanding applications where durability and performance are crucial.