MIL-DTL-38999 Series I connectors offer robust connectivity with up to 128 contacts, ensuring reliable performance in harsh environments. Designed for military specifications, these circular receptacles feature box mounting and bayonet coupling for secure attachment. With a wide operating temperature range of -65°C to 200°C, they are ideal for demanding applications. The connectors come in various shell sizes and insert arrangements, accommodating different contact types, including M39029 rear release crimp contacts. Constructed with high-strength aluminum shells, they provide durability, while the choice of plating options, such as electroless nickel and cadmium finishes, ensures corrosion resistance. RoHS compliant alternatives are also available, meeting environmental standards. Suitable for box and through-bulkhead mounting, these connectors are essential for environments requiring reliable and rugged electrical connections.