The MIL-DTL-38999 Series I connectors offer high-performance connectivity with up to 128 contacts, designed for harsh environments with an operating temperature range from -65 °C to 200 °C. These circular connectors, featuring front and rear wall mount options, as well as jam nut receptacles, ensure secure and reliable connections. Compliant with military specification MIL-DTL-38999 I, they come in a variety of shell sizes and insert arrangements, accommodating M39029 rear release crimp contacts in various sizes. Constructed with durable aluminum shells and available in different plating options like electroless nickel and cadmium finishes, these connectors provide excellent conductivity and ingress protection. Suitable for demanding applications, they are RoHS compliant, meeting environmental standards. Perfect for back panel installations, these connectors guarantee efficient and rugged electrical connectivity in critical operations.