Abstract: An electrical connector configured to engage a header is provided. The connector includes a plug that is configured to be inserted into a header cavity and a sleeve member that surrounds an outer plug surface. The sleeve member includes a plurality of fingers biased to flex away from the plug surface in a flared arrangement. The connector also includes a sealing band that grips the plug surface. Also, the connector includes a collar that is configured to slide in the axial direction. When the collar moves from the retracted position to the locked position, the collar deflects the fingers against the wall surface of the header causing the fingers to cover the sealing band and the sealing band is compressed between the plug body and the header.