The MIL-DTL-38999 Series II connectors are designed for harsh environments, offering reliable performance with up to 128 contacts in an insert. These circular receptacles, with various mounting options like wall mount and jam nut, feature durable aluminum shells and are environmentally sealed for protection. Operating between -65 °C and 200 °C, they meet stringent military specifications for service in demanding conditions. Available in different plating options, including gold and electroless nickel, these connectors ensure optimal conductivity. With M39029 rear release crimp contacts, they guarantee secure connections, ideal for applications requiring rugged and dependable electrical coupling.