MIL-DTL-38999 Series I connectors feature up to 128 contacts in an environmentally sealed insert, with an operating temperature range from -65°C to 200°C. This connector family includes front wall mount, rear wall mount, and jam nut receptacles, as well as RFI grounding plugs. Available in 9 shell sizes and 52 insert arrangements, they use M39029 rear release crimp contacts in various sizes. Constructed with high-strength aluminum shells, these connectors offer plating options like electroless nickel and cadmium finishes. RoHS-certified cadmium-free options are also available. Ideal for harsh environments, these connectors ensure reliable performance with features like bayonet coupling and conductive contact materials. Suitable for applications requiring environment-resistant box and through bulkhead mounting receptacles.