MIL-DTL-38999 Series I connectors offer reliable connectivity in demanding environments, featuring up to 128 contacts within an insert. These circular connectors are designed for back panel wall mounting, with options for front wall mount, rear wall mount, and jam nut receptacles. Meeting military specification MIL-DTL-38999 I, they ensure durability with high strength aluminum shells and various plating choices, including cadmium-free finishes. Operating efficiently in temperatures ranging from -65 °C to 200 °C, they provide a secure connection with bayonet coupling and removable crimp contacts. With options for gold contact plating and a service rating of M, these connectors are ideal for applications requiring rugged and dependable performance.