5H85 Blind Rivet in aluminium with countersunk head, sized 4.0x12mm. This fastener delivers reliable performance for applications requiring permanent, vibration-resistant joints. The countersunk design provides a flush finish ideal for aerospace, automotive, and sheet metal assembly work. Aluminium construction offers lightweight properties while maintaining structural integrity. Suitable for blind-side fastening where access is limited to one side of the workpiece. Professional-grade quality for demanding industrial applications.