MIL-DTL-38999 Series I connectors, designated for harsh environments, feature up to 128 contacts within an insert, offering versatility in connectivity. With a wide operating temperature range from -65 °C to 200 °C, these connectors are designed for rugged applications. Available in various shell sizes and insert arrangements, they accommodate M39029 rear release crimp contacts in multiple sizes. The connectors, encased in high-strength aluminum shells, come with a choice of plating options, including cadmium-free finishes for RoHS compliance. Offering front and rear wall mount as well as jam nut receptacles, they ensure secure and reliable connections in demanding settings. The circular plug design with bayonet coupling and gold contact plating guarantees optimal performance, making them suitable for military and industrial use.