The MIL-DTL-38999 Series I connectors feature up to 128 contacts in an environmentally sealed insert, designed for harsh environments with an operating temperature range of -65 °C to 200 °C. Available in front wall mount, rear wall mount, and jam nut receptacles, they offer RFI grounding plugs and utilize M39029 rear release crimp contacts in various sizes. These connectors come in high-strength aluminum shells with multiple plating options, including cadmium-free finishes. Ideal for military and industrial applications, they ensure reliable performance with a mating life of 500 cycles and conductivity. RoHS compliant, these connectors are essential for demanding environments requiring secure electrical connections.