The D38999/26FC4SN is a circular straight plug connector compliant with MIL-DTL-38999 Series III standards. It features a size 13 aluminum shell with a Class F electroless nickel finish, which provides EMI shielding of -65dB at 10GHz and allows for operation up to 200°C. The connector is configured with a 13-4 insert arrangement housing 4 size 16 socket contacts, rated for 500 mating cycles. With its triple-start threads and scoop-proof design, this connector is ideal for military, aerospace, and industrial applications requiring robust and reliable performance in harsh environments.