The MIL-DTL-38999 Series I connectors feature up to 128 contacts housed in a sealed insert, designed for rugged environments with a wide operating temperature range from -65 °C to 200 °C. Offering front and rear wall mount options, along with jam nut receptacles and RFI grounding plugs, they provide versatility in installation. Available in 9 shell sizes and 52 insert arrangements, these connectors utilize M39029 rear release crimp contacts in various sizes, including coax and twinax. Constructed with durable high-strength aluminum shells, they come with a choice of plating options, including cadmium-free finishes, ensuring compliance with RoHS regulations. With a bayonet coupling and gold-plated contacts, these connectors guarantee reliable performance in demanding applications, meeting MIL-DTL-38999 I standards.