MIL-DTL-38999 Series I connectors offer high performance in harsh environments with up to 128 contacts, featuring front wall mount, rear wall mount, and jam nut receptacles for versatile installation. These connectors, specified by MIL-DTL-38999 I, ensure reliable connectivity with a wide operating temperature range from -65 °C to 200 °C. With 9 shell sizes and 52 insert arrangements available, they accommodate various contact configurations, including M39029 rear release crimp contacts. The connectors, constructed with durable aluminum shells, come in multiple plating options, such as cadmium-free finishes, ensuring compliance with RoHS regulations. Designed for demanding military applications, these connectors, with gold-plated contacts and bayonet coupling, guarantee secure and efficient electrical connections.