The MIL-DTL-38999 Series I connectors feature rugged construction with up to 128 contacts, designed for harsh environments with an operating temperature range from -65 °C to 200 °C. These connectors, available in various shell sizes and insert arrangements, offer versatility in applications. They come in jam nut mount, front and rear wall mount configurations, with RFI grounding options. Utilizing M39029 rear release crimp contacts, they ensure secure connections. The high-strength aluminum shells are offered in different plating options, including RoHS compliant finishes. With gold-plated contacts and bayonet coupling, they provide reliable electrical performance in demanding conditions, making them ideal for military and industrial applications.