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 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, these connectors use M39029 rear release crimp contacts ranging from sizes 22D to 8, including coax and twinax options. Constructed with high-strength aluminum shells, they come with various plating choices like electroless nickel and cadmium finishes. RoHS certified options are also available, ensuring compliance with environmental standards. Suitable for military and industrial applications, these connectors guarantee reliable connectivity in demanding conditions.