The MIL-DTL-38999 Series II connectors are designed for demanding environments, featuring up to 128 contacts in an insert with robust environmental sealing. Operating efficiently in temperatures ranging from -65 °C to 200 °C, these connectors offer versatility with various mounting options such as front and rear wall mount, jam nut, and box mount receptacles. Available in 9 shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts for secure connections. Constructed with aluminum shells and offering multiple plating options including cadmium-free finishes, these connectors ensure reliable performance and durability. Suitable for military and industrial applications, they meet stringent MIL-DTL-38999 II standards for quality and performance.