blind rivet
noun1
Arts, Business, Construction, Crafts, Engineering, Hobbies, Lifestyle, Manufacturing, Metallurgy, Metalworking, Natural sciences, Physical sciences A rivet which can be fixed with access only to the factory head end; most commonly a pop rivet fitted by passing the bucktail through the sheets to be secured, then attaching a rivet gun to a frangible mandrel through the centre of the rivet, which upsets the bucktail to form the field head and breaks off when the correct pressure has been achieved.