MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts within an environmentally sealed insert. With an operating temperature range of -65 °C to 200 °C, these connectors are suitable for a wide range of applications. Available in various shell sizes and insert arrangements, they offer versatility in design. Constructed with high strength aluminum shells and offered in different plating options, including RoHS certified finishes, these connectors ensure durability and reliability. The series includes front wall mount, rear wall mount, and jam nut receptacles, all featuring bayonet coupling for secure connections. Utilizing M39029 rear release crimp contacts, they provide efficient and removable contact solutions. With a service rating of II and ingress protection, these connectors are ideal for demanding environments.