The MIL-DTL-38999 Series I connectors boast a high-contact capacity of up to 128 inserts, ensuring robust connectivity in demanding environments. With a wide operating temperature range from -65 °C to 200 °C, these connectors are ideal for harsh conditions. Available in various shell sizes and insert arrangements, they feature front wall mount, rear wall mount, and jam nut receptacles, along with RFI grounding plugs. Constructed with durable aluminum shells and offering multiple plating options, including cadmium-free finishes, they guarantee reliability in military and aerospace applications. The M39029 rear release crimp contacts, in sizes 22D, 22M, 22, 20, 16, and 8, facilitate secure connections. Compliant with MIL-DTL-38999 I specifications, these circular receptacles, designed for bayonet coupling, ensure efficient and long-lasting performance in critical systems.