MIL-DTL-38999 Series I connectors offer reliable connectivity in harsh environments, featuring up to 128 contacts within an insert. These circular connectors, compliant with military specification MIL-DTL-38999 I, are designed for back panel wall mounting with a secure bayonet coupling. With a wide operating temperature range from -65 °C to 175 °C, they ensure consistent performance in extreme conditions. The connectors, constructed of high-strength aluminum, come in various shell sizes and insert arrangements, accommodating M39029 rear-release crimp contacts. Available in different plating options including gold, electroless nickel, and cadmium finishes, they provide excellent corrosion resistance. RoHS compliant versions are also offered, meeting environmental regulations. Suitable for demanding applications, these MIL-DTL-38999 I connectors guarantee durability and longevity with their conductive socket contacts and environment-resistant design.