MIL-DTL-38999 Series I connectors offer robust performance in harsh environments, featuring up to 128 contacts in an insert. These circular connectors are designed for durability, with environmental sealing and a wide operating temperature range from -65 °C to 200 °C. Available in various shell sizes and insert arrangements, they come in aluminum shells with plating options including cadmium-free finishes. With options for front wall mount, rear wall mount, and jam nut receptacles, as well as RFI grounding plugs, these connectors ensure reliable connectivity in demanding applications. Meeting military specification MIL-DTL-38999 I, they are ideal for use in environments requiring high strength and conductivity.