MIL-DTL-38999 Series II connectors feature up to 128 contacts in an insert, designed for harsh environments with an operating temperature range of -65 °C to 200 °C. Available in various mount types including front and rear wall mount, jam nut, and box mount receptacles. These connectors come in 9 shell sizes and 52 insert arrangements, utilizing M39029 rear release crimp contacts. Made of aluminum with plating options such as electroless nickel and cadmium finishes, offering RoHS compliant alternatives. Suitable for military and industrial applications, they ensure reliable connectivity with gold-plated contacts and a mating type of bayonet coupling. The connectors are environmentally sealed and meet MIL-DTL-38999 II specifications, providing durable performance in demanding settings.