MIL-DTL-38999 Series I connectors offer robust connectivity with up to 128 contacts, sealed for harsh environments. Operating reliably between -65 °C and 200 °C, they come in various shell sizes and insert arrangements, featuring M39029 rear release crimp contacts. Available in aluminum shells with plating options like cadmium and nickel, these connectors ensure durability. The family includes front and rear wall mount receptacles, with RFI grounding plugs for added versatility. With a secure bayonet coupling, they cater to military specifications and offer high conductivity, making them ideal for demanding applications.