MIL-DTL-38999 Series II connectors offer high-performance connectivity with up to 128 contacts in an insert, designed for harsh environments. These circular connectors are environmentally sealed, ensuring reliable operation in extreme conditions ranging from -65 °C to 200 °C. Available in various mount types including wall mount, jam nut, and box mount receptacles, they feature a bayonet coupling for secure mating. With options for straight, RFI grounding, and standard plugs with a 90-degree cable clamp, they provide versatility in installation. Constructed with aluminum shells and offering multiple plating choices, including RoHS compliant finishes, these connectors guarantee durability and compatibility. Utilizing M39029 rear release crimp contacts, they ensure efficient and secure connections, with a mating life of 500 cycles. Suitable for military and industrial applications, these connectors are ideal for potting with a service rating of I, providing reliable performance in demanding environments.