MIL-DTL-38999 Series I connectors offer high performance in harsh environments, featuring up to 128 contacts sealed for protection. With a wide operating temperature range from -65°C to 200°C, these connectors are reliable in extreme conditions. Available in various shell sizes and insert arrangements, they accommodate M39029 rear release crimp contacts for secure connections. The durable aluminum shells come in plating options such as cadmium-free finishes, ensuring both strength and environmental compliance. Perfect for military and industrial applications, these connectors provide reliable connectivity with gold-plated contacts, bayonet coupling, and jam nut mounting options.