MIL-DTL-38999 Series I connectors boast up to 128 contacts, offering exceptional environmental sealing and a wide operating temperature range from -65 °C to 200 °C. This connector family includes front wall mount, rear wall mount, and jam nut receptacles, along with RFI grounding plugs. With 9 shell sizes and 52 insert arrangements available, these connectors feature M39029 rear release crimp contacts in various sizes, including coax and twinax. Constructed with high-strength aluminum shells, they come with multiple plating options such as electroless nickel and cadmium finishes. RoHS certified options are also available, ensuring compliance with environmental standards. Suitable for demanding applications, these connectors guarantee reliable performance with a mating life of 500 cycles and exceptional ingress protection.