MIL-DTL-38999 Series I connectors offer robust connectivity with up to 128 contacts in an insert, designed for harsh environments. These circular receptacles, featuring front wall mount, rear wall mount, and jam nut options, are ideal for military and aerospace applications. With a wide operating temperature range of -65°C to 200°C, they ensure reliable performance in extreme conditions. Made of high-strength aluminum, these connectors come in various plating options, including cadmium-free finishes. Utilizing M39029 rear release crimp contacts, they guarantee secure and efficient connections. Suitable for box and through bulkhead mounting, these connectors are essential for maintaining conductivity and environmental resistance in critical systems.