MIL-DTL-38999 Series I connectors feature up to 128 contacts in an insert, offering environmental sealing and a wide operating temperature range from -65 °C to 200 °C. Designed for harsh environments, this connector family includes front and rear wall mount as well as jam nut receptacles with RFI grounding plugs. Available in 9 shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts in various sizes. Constructed with high-strength aluminum shells, these connectors come in multiple plating options including cadmium-free finishes, ensuring reliability. Suitable for military and industrial applications, they meet stringent MIL-DTL-38999 I specifications.