MIL-DTL-38999 Series I connectors offer robust connectivity with up to 128 contacts, designed for harsh environments. Featuring front and rear wall mount options, along with jam nut receptacles, they ensure secure installations. These circular connectors are MIL-DTL-38999 I compliant and come in 9 shell sizes with 52 insert arrangements, accommodating various applications. Utilizing M39029 rear release crimp contacts, they guarantee reliable connections. With a wide range of plating options, including cadmium-free finishes, they meet diverse industry requirements. Made of high-strength aluminum, these connectors are built to withstand extreme temperatures, ranging from -65 °C to 200 °C. Trusted for their durability and performance, they are ideal for mission-critical systems in military and aerospace applications.