O-rings get lost periodically and get warped/worn out over time. A damaged O-ring,(or no faucet O-ring, at all) means a poor seal, leading to a leaky
DANCO 100-Piece Assorted Flat Washer Set 34441 - The Home Depot
These Performance Tool O-ring kits will always be handy when you're in a bind. They come with a large selection of different sizes for any job.
Metric O-Ring Assortment (419-Piece)
DANCO #18 O-Ring (10-Pack) 96735 - The Home Depot
DANCO Repair Kit for Delex 88101 - The Home Depot
DANCO 200-Piece O-Ring Kit 34443 - The Home Depot
DANCO O-Ring Assortment (14-Piece) 80788 - The Home Depot
DANCO O-Ring (10-Pack) 96727 - The Home Depot
200-Piece O-Ring Kit - Danco
These Danco faucet washers can help you repair your leaky faucet. Replacing the seals on the faucet stem will create a better seal and help prevent
#9 O-Ring (10-Pack)
Danco 34443 O-Ring Assortment, #00, Rubber Replacing the seals on the faucet stem will create a better seal and help prevent water leaks for the future. Faucets usually have one or more O-rings that prevent water from leaking around the spout. Replacing work-out O-rings is an inexpensive alternative to replacing the entire faucet fixture. Stopping the leak saves both water and energy. This O-ring kit comes with a variety of the most used O-rings on the market.
Danco O-Ring, Assorted - 200 pack
Lifetime 6-Foot Commercial Nesting Folding Table Gray (80817)
DANCO 100-Piece Assorted Flat Washer Set 34441 - The Home Depot