MIL-DTL-38999 Series II connectors are designed for harsh environments, offering up to 128 contacts within an insert. These circular connectors are front wall mount, rear wall mount, jam nut, rear box mount, and front box mount receptacles, providing versatility in installation. With a wide operating temperature range of -65 °C to 200 °C, they are suitable for various applications. Constructed with aluminum shells and available in different plating options, including RoHS certified finishes, these connectors ensure durability and reliability. Utilizing M39029 rear release crimp contacts in various sizes, they guarantee secure connections. The straight plugs come with RFI grounding and standard options, featuring a 90-degree cable clamp for efficient cable management. Trusted for military applications, MIL-DTL-38999 II connectors offer high performance with a service rating of M, making them ideal for demanding environments.