Qualfast: 4.8X20MM Aluminium Countesunk Head Rivet (Box 250) Countersunk For all applications of blind riveting. Aluminium rivet head with steel mandrel. Medium strength, use with aluminium and where rust is a problem. Select grip based on thickness of material to be riveted. MPN: QFT-644-1181N EAN: 5036140321496 4.8X20MM Aluminium Countesunk Head Rivet (Box 250) Attributes: Box Quantity: 250 Head Shape: Countersunk Head Length: 20mm Material: Aluminium Rivet Diameter: 4.8mm Surface Treatment: Zinc Plated