12mm x 6mm x 0.5mm Shim Washers (DIN 988) - A2 Stainless Steel: Accu.co.uk: Washers & Spacers
Hardware Washer 20/50Pcs M5 M6 M8 M10 M12 M14 M16 To M30 High Pressure Hydraulic Pipe Seal Pad Rubber Metal Shim Seal Gasket NBR Metal Washer Flat Finish Washer : Amazon.co.uk: DIY