MIL-DTL-38999 Series II connectors are designed for harsh environments, with up to 128 contacts housed in a sealed insert. Operating between -65°C and 200°C, they offer durability in extreme conditions. Featuring various mounting options like front and rear wall mount, jam nut, and box mount receptacles, these connectors provide versatility in installation. Available in 9 shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts for reliable connectivity. Constructed with aluminum shells, they are plated with options like cadmium, nickel, and anodized finishes, meeting RoHS standards. Perfect for military and industrial applications, these connectors ensure secure and efficient electrical connections.