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 from -65 °C to 200 °C. This harsh environment connector family offers front and rear wall mount as well as jam nut receptacles, all with RFI grounding options. Available in 9 shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts in various sizes. Constructed with high-strength aluminum shells, these connectors come with a choice of plating options, including cadmium-free finishes. Meeting military specification MIL-DTL-38999 I, they are ideal for demanding environments requiring reliable electrical connections.