The MIL-DTL-38999 Series II connectors boast up to 128 contacts within their environmentally sealed inserts, ensuring reliable performance in harsh environments. With an impressive operating temperature range of -65°C to 200°C, these connectors are suitable for a wide range of applications. Featuring various mounting options including front and rear wall mount, jam nut, and box mount receptacles, they offer flexibility for installation. Available in 9 shell sizes and 52 insert arrangements, these connectors utilize durable M39029 rear release crimp contacts, guaranteeing secure connections. Constructed with aluminum shells and offered with multiple plating options, including RoHS certified finishes, they provide both durability and environmental compliance. The MS27499 connectors are ideal for military and aerospace applications, meeting stringent MIL-DTL-38999 II specifications.