MIL-DTL-38999 Series I connectors, designed for harsh environments, feature front wall mount, rear wall mount, and jam nut receptacles with up to 128 contacts in an insert. Operating between -65 °C and 200 °C, these connectors offer reliability in extreme conditions. Utilizing M39029 rear release crimp contacts, they come in 9 shell sizes and 52 insert arrangements. Constructed with high-strength aluminum shells and various plating options including cadmium-free finishes, they ensure durability and performance. Ideal for military and industrial applications, these connectors meet MIL-DTL-38999 I specifications, providing secure and efficient electrical connections in demanding environments.