MIL-DTL-38999 Series I connectors offer reliable performance in harsh environments with up to 128 contacts, sealed for protection and operating in temperatures ranging from -65 °C to 200 °C. Featuring front and rear wall mount options, as well as jam nut receptacles, this connector family is versatile. With 9 shell sizes and 52 insert arrangements, they accommodate various applications using M39029 rear release crimp contacts. Constructed with high-strength aluminum shells and available in different plating options, including RoHS compliant finishes, these connectors ensure durability and compliance. Suitable for military and industrial use, the MIL-DTL-38999 I connectors provide secure electrical connections, with gold contact plating for optimal conductivity and a mating style of bayonet coupling.