MIL-DTL-38999 Series II connectors are engineered for harsh environments, boasting up to 128 contacts with environmental sealing for reliable performance. Operating seamlessly in temperatures ranging from -65°C to 200°C, these connectors offer versatility in demanding conditions. Featuring various mounting options such as front and rear wall mount, jam nut, and box mount receptacles, they cater to diverse connectivity needs. Available in 9 shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts for secure connections. Crafted from durable aluminum with plating options including gold, electroless nickel, and anodized finishes, these connectors ensure long-lasting conductivity. Their bayonet coupling and removable crimp contacts facilitate easy installation and maintenance, making them ideal for military and industrial applications requiring rugged performance.