The 10-040450-016 is a plain flat sealing gasket made from synthetic rubber, intended for use with shell size 16 and 16S flange-mounted receptacles. This gasket features an 'A' dimension of 0.969 inches, a 'B' dimension of 1.000 inches, and a 'C' dimension of 1.281 inches. The four mounting holes have a diameter of 0.172 inches. It is designed to take full advantage of the waterproof and pressure sealing features of the connector assembly, ensuring reliable performance in various applications.