Abstract: A self-sealing neck for an oil filter comprising a filter body provided with an opening which is surrounded by a collar. The self-sealing neck includes a coupling having a central bore with an enlarged recess at one end, an outwardly extending flange at the one end, a gasket fitted or molded over the flange and covering the front end and has an inner portion seated in the recess. The self-sealing neck overlies the collar with the gasket engaging the filter body with the portion of the gasket in the recess frictionally clampingly engaging the collar and the flanged portion also sealing against the filter body.