Abstract: A plastic glue plug has an axially extending bore which opens out at the insertion end of the plug. The bore contains a given quantity of glue which is held sealingly enclosed by a plunger partially inserted to a starting position in the bore. When the plug is pressed into an attachment hole, the plunger is forced to a bottom position in the plug while, at the same time, pressing glue beyond the plunger and out of the plug at the insertion end thereof, this glue being forced onto the mutually abutting surfaces of the plug and the attachment hole.