MIL-DTL-38999 Series I connectors feature up to 128 contacts in an insert, designed for harsh environments with an operating temperature range of -65 °C to 200 °C. Offering front wall mount, rear wall mount, and jam nut receptacles, as well as RFI grounding plugs, they ensure secure connections. Available in 9 shell sizes and 52 insert arrangements, these connectors use M39029 rear release crimp contacts. Constructed with high-strength aluminum shells, they come in various plating options including cadmium-free finishes for RoHS compliance. Ideal for military and industrial applications, these circular connectors guarantee reliable performance in demanding conditions.