MIL-DTL-38999 Series I connectors are designed for harsh environments, with up to 128 contacts housed in an environmentally sealed insert. Operating between -65 °C and 200 °C, these connectors offer reliability in extreme conditions. Featuring front and rear wall mount options, as well as jam nut receptacles, they provide versatile connectivity solutions. Utilizing M39029 rear release crimp contacts in various sizes, including coax and twinax, these connectors ensure secure and efficient connections. Constructed with high-strength aluminum shells and offered in a range of plating options, such as cadmium-free finishes, they meet stringent military specifications. With a bayonet coupling and gold contact plating, they guarantee durability and conductivity. Suitable for wall mounting applications, these connectors are ideal for demanding environments requiring reliable electrical connections.