The MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts in an environmentally sealed insert. With an operating temperature range of -65 °C to 200 °C, these connectors offer reliable performance in a variety of conditions. Available in 9 shell sizes and 52 insert arrangements, they accommodate M39029 rear release crimp contacts in various sizes. Constructed with high-strength aluminum shells and offering a range of plating options, including cadmium-free finishes, these connectors ensure durability and performance. Suitable for wall mount applications, they come in front wall mount, rear wall mount, and jam nut receptacle options. With features like bayonet coupling and RFI grounding plugs, they meet the stringent requirements of military specification MIL-DTL-38999 I.