MIL-DTL-38999 Series I connectors feature a rugged design suitable for harsh environments, with up to 128 contacts housed in an insert. These circular connectors are environmentally sealed, offering reliable performance in a wide range of operating temperatures from -65 °C to 200 °C. Available in various shell sizes and insert arrangements, they come in front wall mount, rear wall mount, and jam nut receptacle options, along with RFI grounding plugs. Utilizing M39029 rear release crimp contacts, these connectors ensure secure connections. Constructed with high-strength aluminum shells, they offer durability and are available in different plating options, including cadmium-free finishes for RoHS compliance. Suitable for military and industrial applications, MIL-DTL-38999 Series I connectors provide reliable connectivity in demanding conditions.