The MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts in an insert. With front and rear wall mount options, as well as jam nut receptacles, they provide versatile connectivity solutions. Operating between -65°C and 200°C, these connectors are environmentally sealed for reliable performance. Available in 9 shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts in various sizes. Constructed with high strength aluminum shells, they offer durability in demanding applications. Plating options include cadmium-free finishes, meeting RoHS certification. With gold contact plating and a maximum operating temperature of 175°C, they ensure efficient signal transmission. Suitable for military and industrial use, these connectors are ideal for applications requiring rugged and reliable connectivity.