MIL-DTL-38999 Series I connectors feature up to 128 contacts in an environmentally sealed insert, designed for harsh environments with an operating range of -65 °C to 200 °C. Available in front and rear wall mount, as well as jam nut receptacles, they offer RFI grounding options. With 9 shell sizes and 52 insert arrangements using M39029 rear release crimp contacts, these connectors ensure secure connections in aerospace and military applications. Crafted from high-strength aluminum, they come in various plating options, including cadmium-free finishes. Meeting MIL-DTL-38999 I specifications, these circular connectors are ideal for demanding environments requiring durable and reliable electrical connectivity.