MIL-DTL-38999 Series II connectors are designed for rugged environments, featuring up to 128 contacts in an insert with environmental sealing for reliable performance. Operating between -65°C and 200°C, these connectors offer versatility with various mounting options including front and rear wall mount, jam nut, and box mount receptacles. Available in 9 shell sizes and 52 insert arrangements, they use M39029 rear release crimp contacts for secure connections. The aluminum shells come in different plating options such as cadmium and nickel, with RoHS certified finishes available. With a focus on durability and functionality, these connectors are ideal for military and industrial applications.