MIL-DTL-38999 Series I connectors feature up to 128 contacts in an environmentally sealed insert, designed for rugged applications with an operating temperature range of -65 °C to 200 °C. Available in various shell sizes and insert arrangements, they offer flexibility for different requirements, with options for front wall mount, rear wall mount, and jam nut receptacles. These connectors utilize M39029 rear release crimp contacts and come in high-strength aluminum shells with multiple plating options, including cadmium-free finishes for RoHS compliance. Ideal for military and industrial use, they provide reliable connectivity in harsh environments.