The MIL-DTL-38999 Series I connectors feature up to 128 contacts in an insert, designed for harsh environments with a wide operating temperature range of -65 °C to 200 °C. Offering front wall mount, rear wall mount, and jam nut receptacles, they ensure secure connections in demanding applications. These connectors, compliant with military specification MIL-DTL-38999 I, come in high-strength aluminum shells with various plating options including electroless nickel and cadmium finishes. Utilizing M39029 rear release crimp contacts, they guarantee reliable performance with gold-plated removable crimp contacts. With a mating type of bayonet coupling and a service rating of I, they are suitable for critical military and aerospace applications requiring rugged and durable connectivity.