Bralo large head aluminium multigrip blind rivets bralo 1100004825 these large head multigrip blind rivets from bralo have an aluminium body and a zinc plated steel mandrel multigrip rivets offer a wider gripping range than standard rivets these pop rivets have a thread diameter of 48mm and a length of 25mm bralo 1100004825 large head aluminium multigrip rivet 48mm x 250mm pack 100