MIL-DTL-38999 Series I connectors offer rugged performance with up to 128 contacts, suitable for harsh environments. Featuring front wall mount, rear wall mount, and jam nut receptacles, they ensure secure connections. These connectors, complying with military specification MIL-DTL-38999 I, are crafted from high-strength aluminum shells and are environmentally sealed, operating reliably in temperatures ranging from -65 °C to 200 °C. With a variety of plating options, including cadmium-free finishes, they guarantee durability and conductivity. The connectors, equipped with M39029 rear release crimp contacts, come in 9 shell sizes and 52 insert arrangements, meeting diverse connectivity needs. Perfect for applications requiring reliability under tough conditions, they offer a mating type of Bayonet and a contact style of Pin. Suitable for environment-resistant Box and Through Bulkhead Mounting Receptacle types, these connectors ensure high performance with a contact gender of Male and a service rating of E.