The MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring front wall mount, rear wall mount, and jam nut receptacles for secure installations. With up to 128 contacts in an insert, these connectors offer robust connectivity. Operating within a wide temperature range from -65 °C to 200 °C, they are suitable for demanding applications. Made of high-strength aluminum, they come in various shell sizes and insert arrangements, utilizing M39029 rear release crimp contacts for reliable connections. The connectors are offered in different plating options, including cadmium-free finishes for RoHS compliance. Ideal for military and aerospace use, they provide excellent conductivity and ingress protection, ensuring reliable performance in challenging environments.