MIL-DTL-38999 Series I connectors are ruggedly designed for harsh environments, featuring up to 128 contacts in an insert with front wall mount, rear wall mount, and jam nut receptacles. These connectors are meticulously engineered for optimal performance, with a wide operating temperature range from -65 °C to 200 °C. Constructed with high-strength aluminum shells and available in various plating options, including RoHS-certified finishes, they offer durability and reliability in demanding applications. Utilizing M39029 rear release crimp contacts, they ensure secure connections with 52 insert arrangements. The series I connectors, compliant with military specification MIL-DTL-38999, are ideal for aerospace, defense, and industrial applications where environmental sealing and high conductivity are essential.