MIL-DTL-38999 Series I connectors offer high-performance connectivity with up to 128 contacts in an environmentally sealed insert. Designed for harsh environments, these connectors feature front and rear wall mount options, along with jam nut receptacles and RFI grounding plugs. With a wide operating temperature range from -65 °C to 200 °C, they are suitable for demanding applications. Available in 9 shell sizes and 52 insert arrangements, these connectors use M39029 rear release crimp contacts, ensuring reliable connections. The high-strength aluminum shells can be plated with various options, including cadmium-free finishes for RoHS compliance. These circular plugs, part of the military-specification MIL-DTL-38999 I series, are ideal for aerospace, defense, and industrial applications requiring rugged and dependable connectivity.