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 various mounting options including front and rear wall mount, as well as jam nut receptacles, they offer RFI grounding plugs for optimal performance. With 9 shell sizes and 52 insert arrangements utilizing M39029 rear release crimp contacts, these connectors ensure reliable connectivity in aerospace and military applications. Crafted from high-strength aluminum, they come in a range of plating options including cadmium-free finishes, meeting RoHS compliance standards. Suitable for demanding environments, these connectors guarantee durability and conductivity, making them ideal for mission-critical systems.