Bralo Dome Head Rivet - Bralo 1010005008, These dome head standard blind rivets from Bralo have an aluminium body and a mandrel made from zinc-plated steel. These "pop" rivets have a thread of 5mm and are 8mm long. They are suitable for use with panel thicknesses from 3 up to 4.5mm. Bralo 1010005008 Dome Head Aluminium Standard Rivet Ø 5.0mm x 8mm - Pack Of 500