Sterling Seal CRG7540.200.031.300X5 7540 Vegetable Fiber Ring Gasket, 1/32" Thick, Pressure Class 300#, 2" Pipe Size, Tan (Pack of 5): Amazon.com: Industrial & Scientific
3/4" OD Hose Gasket O Ring Flat Rubber Washers Neoprene Washers Rubber Flat Washer Grommet: Amazon.com: Industrial & Scientific
Amazon.com: uxcell Nylon Flat Washers 17mm OD 6mm ID 1.5mm Thickness for Faucet Pipe Water Hose, Pack of 100 : Industrial & Scientific