MIL-DTL-38999 Series I connectors set the standard for rugged performance in harsh environments, boasting up to 128 contacts in a sealed insert. Operating flawlessly in temperatures ranging from -65 °C to 200 °C, these connectors come in various shell sizes and insert arrangements, offering versatility in design. Featuring a range of receptacles, including front wall mount, rear wall mount, and jam nut options, they ensure secure connections in diverse applications. Utilizing M39029 rear release crimp contacts, they guarantee reliable signal transmission. Constructed with high-strength aluminum shells and available in different plating options, such as electroless nickel and cadmium finishes, these connectors prioritize durability. Their bayonet coupling mechanism and gold-plated contacts further enhance their performance, making them ideal for military and industrial use.