MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts sealed within their inserts. With an operating temperature range from -65 °C to 200 °C, these connectors offer reliable performance in extreme conditions. Available in various shell sizes and insert arrangements, they accommodate M39029 rear release crimp contacts for secure connections. Constructed with high-strength aluminum shells, they come in a range of plating options, including cadmium-free finishes for RoHS compliance. Whether for front or rear wall mounting or jam nut receptacles, these connectors ensure durability and conductivity, meeting military specification MIL-DTL-38999 I.