Military Standard MS35769-9 Copper Crush Gasket at SkyGeek.com
18mm Inner Dia Copper Crush Washers Flat Car Sealing Plate Gaskets Rings 50pcs - Newegg.ca
12 mm 0.47" ID Copper Crush Washers M12 Brake Hose Spacer Flat 16mm-OD 12mm-ID fit on 12mm Bolt Pack of 20 : Amazon.ca: Musical Instruments, Stage & Studio
15mm Inner Dia Copper Crush Washers Car Engine Flat Sealing Gaskets Rings 30pcs - Newegg.ca