MIL-DTL-38999 Series II connectors are designed for rugged environments, offering up to 128 contacts in an insert. With an impressive operating temperature range from -65 °C to 200 °C, these connectors provide reliable performance in harsh conditions. Featuring various mounting options such as front and rear wall mount, jam nut, and box mount receptacles, they offer flexibility in installation. Available in 9 shell sizes and 52 insert arrangements, these connectors use M39029 rear release crimp contacts for secure connections. Made of durable aluminum with different plating options, including cadmium-free finishes, they ensure long-lasting durability. With a bayonet coupling and gold contact plating, these connectors guarantee efficient signal transmission. Suitable for military and industrial applications, they are classified as M-rated for service.