MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts in an insert and offering front and rear wall mount options, as well as jam nut receptacles. These connectors, meeting military specification MIL-DTL-38999 I, are environmentally sealed and can operate in temperatures ranging from -65 °C to 200 °C. Available in 9 shell sizes and 52 insert arrangements, they use M39029 rear release crimp contacts in various sizes. Constructed with high strength aluminum shells, they come with plating options such as cadmium finishes and electroless nickel. RoHS compliant versions are also available.