The MIL-DTL-38999 Series II connectors are designed for rugged environments, with up to 128 contacts and a wide operating temperature range from -65°C to 200°C. These connectors feature various mounting options such as front wall mount, rear wall mount, jam nut, and box mount receptacles, offering versatility in installation. With a selection of shell sizes and insert arrangements, they accommodate M39029 rear release crimp contacts in sizes 22D, 22M, 22, 20, 16, and 12. Constructed with aluminum shells and available in different plating options, including cadmium-free finishes, these connectors ensure reliable performance in harsh conditions. The Bayonet coupling mechanism and gold contact plating guarantee secure connections, while the electroless nickel and cadmium olive drab coatings enhance durability. Suitable for military and industrial applications, the MIL-DTL-38999 Series II connectors are essential for maintaining connectivity in demanding environments.