MIL-DTL-38999 Series I connectors offer reliable performance in harsh environments with up to 128 contacts in an insert. Featuring front and rear wall mount options, as well as jam nut receptacles, they ensure secure connections. These environmentally sealed connectors, meeting military specifications, operate within a wide temperature range from -65°C to 200°C. Utilizing M39029 rear release crimp contacts, they provide versatility with 52 insert arrangements. Constructed with high strength aluminum shells and available in various plating options, including RoHS certified finishes, they guarantee durability and compatibility. The bayonet coupling mechanism and gold-plated contacts ensure efficient signal transmission and mating. Suitable for demanding applications, these connectors offer conductivity and ingress protection, making them ideal for aerospace, defense, and industrial use.