MIL-DTL-38999 Series I connectors offer rugged performance with up to 128 contacts in an environmentally sealed insert. Designed for harsh environments, they feature front and rear wall mount options, as well as jam nut receptacles with RFI grounding plugs. The connectors, compliant with military specification MIL-DTL-38999 I, come in 9 shell sizes and 52 insert arrangements, accommodating M39029 rear release crimp contacts. Constructed with high-strength aluminum shells, they are available in various plating options, including cadmium-free finishes for RoHS compliance. Operating temperatures range from -65 °C to 200 °C, making them ideal for demanding applications that require reliability and durability.