MIL-DTL-38999 Series I connectors feature up to 128 contacts housed in an environmentally sealed insert, designed for harsh operating conditions with a wide temperature range from -65 °C to 200 °C. This connector family includes front wall mount, rear wall mount, and jam nut receptacles, along with RFI grounding plugs, offering versatility in installation. Compliant with military specification MIL-DTL-38999 I, they come in 9 shell sizes and 52 insert arrangements, utilizing M39029 rear release crimp contacts. Constructed with high-strength aluminum shells, these connectors are available in various plating options such as cadmium and nickel, with RoHS-certified finishes. Suitable for demanding applications, they ensure reliable performance with features like gold contact plating, bayonet coupling, and a service rating of M. The connectors are designed for female contact gender, with socket contact style and conductive conductivity, providing robust connectivity in challenging environments.