Plumbing Washers | McMaster-Carr

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608 Products

About O-Rings

Faucet Washers

Faucet Washer Assortments

Faucet Repair and Installation Kits

These kits include parts commonly needed for faucet repair or installation.

Replacement Adapter Washers for Slip-Joint Fittings

These adapters connect 1 ¼” OD pipe to 1 ½” OD pipe.

Replacement Washers for Slip-Joint Fittings

Toilet and Urinal Sealing Rings

Tankless Toilet and Urinal Inlet Connectors

Connect wall-mount toilets and urinals to the flush valve. These connectors are also known as spuds.

Toilet Tank-to-Bowl Gaskets

Create a tight seal between your toilet tank and bowl with these gaskets.

Garden Hose Fitting Washers

Insert these washers in the threaded female end of a garden hose fitting to prevent leaks.

Inline Strainer Washers

Install these strainer washers in pipe or fittings to protect equipment in locations where other strainers don’t fit.

Sealing and Coating

Square-Profile Oil-Resistant Buna-N O-Rings

With flat edges on all four sides, square-profile O-rings cover more surface than round-profile O-rings for a better seal in static applications, such as hose, pipe, and faucet connections.

Square-Profile Chemical-Resistant
Viton® Fluoroelastomer O-Rings

With flat edges on all four sides, these square-profile O-rings cover more surface than round-profile O-rings for a better seal in static applications, such as hose, pipe, and faucet connections.

Square-Profile High-Temperature Silicone O-Rings

These square-profile O-rings have flat edges on all four sides, so they cover more surface than round-profile O-rings for a better seal in static applications, such as hose, pipe, and faucet connections.

Square-Profile Oil-Resistant
Buna-N O-Ring Assortments

These O-rings have a square profile with flat edges on all four sides. They cover more surface than round-profile O-rings for a better seal in static applications, such as hose, pipe, and faucet connections.

Water-Resistant SBR Hose Gasket Washers

Made of SBR rubber, these washers won’t break down from exposure to water.

Oil-Resistant Neoprene Hose Gasket Washers

Made of neoprene rubber, these washers resist oil.

Water-Resistant EPDM Hose Gasket
Washers for Drinking Water Systems

Safe to use in drinking water systems, these washers meet strict NSF/ANSI 61 standards. All are made of EPDM rubber, so they won’t break down from exposure to water.