MIL-DTL-38999 Series I connectors are ideal for harsh environments, featuring up to 128 contacts in an insert. These connectors are designed for front wall mount, rear wall mount, and jam nut receptacles, with RFI grounding plugs for added functionality. With 52 insert arrangements available, they offer versatility in applications. Constructed with high-strength aluminum shells and various plating options, including RoHS certified finishes, these connectors ensure durability and reliability. Operating between -65 °C and 200 °C, they are suitable for a wide range of environments. Utilizing M39029 rear release crimp contacts, they offer secure and efficient connectivity. With a service rating of M and a contact mating life of 500 cycles, these connectors are designed to meet the demands of military and industrial settings.