MIL-DTL-38999 Series I connectors feature up to 128 contacts within an environmentally sealed insert, designed for rugged applications with an operating range of -65 °C to 200 °C. Available in various shell sizes and insert arrangements, these connectors offer versatility with M39029 rear release crimp contacts in multiple sizes. Constructed with high-strength aluminum shells and offered in a range of plating options, including RoHS-certified finishes, they ensure reliable performance in harsh environments. The connector family includes front wall mount, rear wall mount, and jam nut receptacles, along with RFI grounding plugs, catering to diverse installation needs. Ideal for military and industrial use, these connectors guarantee durability and conductivity, with a mating life of 500 cycles and environment-resistant properties.