MIL-DTL-38999 Series I connectors feature up to 128 contacts in an insert, offering environmental sealing and a wide operating temperature range from -65 °C to 200 °C. This harsh environment connector family includes front wall mount, rear wall mount, and jam nut receptacles, along with RFI grounding plugs, providing versatility in installation. With 9 shell sizes and 52 insert arrangements available, these connectors utilize M39029 rear release crimp contacts in various sizes, including coax and twinax options. Constructed with high-strength aluminum shells, they come in different plating options such as electroless nickel and cadmium finishes, including RoHS certified cadmium-free coatings. The MS27467 connectors, known for their reliability, are designed for straight plug mounting in military and industrial applications, ensuring secure and durable electrical connections even in demanding environments.