Danco 35711B Faucet O-ring, #83, 5/16 in ID x 1/2 in OD Dia, 3/32 in Thick, Buna-N

The Danco O-ring will repair your leaky faucet. Faucets usually have one or more O-ring to prevent water from leaking out around the spout. Replacing worn-out O-ring is an inexpensive alternative to replacing the entire faucet fixture.