Bralo large head aluminium multigrip blind rivets bralo 1100004817 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 17mm bralo 1100004817 large head aluminium multigrip rivet 48mm x 170mm pack 150