MIL-DTL-38999 Series I connectors boast a rugged design suitable for harsh environments, featuring up to 128 contacts in an insert. These circular connectors offer reliable performance with environmental sealing and a wide operating temperature range from -65 °C to 200 °C. Available in various shell sizes and insert arrangements, they accommodate M39029 rear release crimp contacts for secure connections. The connectors come in high-strength aluminum shells with options for different plating finishes, including RoHS-certified cadmium-free coatings. Ideal for military and industrial applications, they provide durability and conductivity, meeting stringent performance standards.