The MIL-DTL-38999 Series I connectors feature up to 128 contacts in an insert, designed for harsh environments with a wide operating temperature range of -65 °C to 200 °C. Available in various shell sizes and insert arrangements, these connectors offer front and rear wall mount as well as jam nut receptacles, with RFI grounding plugs. Constructed with high-strength aluminum shells, they come with multiple plating options including electroless nickel and cadmium finishes. Utilizing M39029 rear release crimp contacts, these connectors ensure reliable performance with RoHS certified cadmium-free options. Suitable for military and industrial applications, they provide secure and durable connectivity with male pin contact style and bayonet mating.