MIL-DTL-38999 Series II connectors feature up to 128 contacts in an environmentally sealed insert, designed for harsh environments with an operating temperature range of -65 °C to 200 °C. Available in various mounting styles such as front wall mount and jam nut receptacles, they offer versatility in installation. These connectors come in aluminum shells with plating options including cadmium-free finishes, ensuring durability and compliance with RoHS regulations. Utilizing M39029 rear release crimp contacts, they provide reliable connectivity with sizes ranging from 22D to 12. With features like bayonet coupling and removable crimp contacts, they are ideal for military and aerospace applications, offering 500 mating cycles and reliable conductivity.