Polyurethane Washers | McMaster-Carr

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Fastening and Joining

Moisture-Resistant Cushioning Washers

These polyurethane washers withstand wet conditions as well as sunlight, ozone, and some chemicals.

One-Piece Socket Retaining Rings

Oil- and Abrasion-Resistant Polyurethane O-Rings

Oil- and Abrasion-Resistant Polyurethane O-Rings

More abrasion resistant than Buna-N O-rings, these also resist mineral oil and motor oil.

Oil- and Abrasion-Resistant Polyurethane O-Rings
for Tube Fittings with Straight-Thread Connection

Commonly called Boss O-rings, these O-rings are for use in tube fittings with a straight-thread connection.

Ultra-Strength Oil- and
Abrasion-Resistant Polyurethane O-Rings

These O-rings are harder and stronger than standard polyurethane O-rings to handle high-pressure applications.

Flat Disc Springs

Flat Disc Springs

These flat rubber springs handle heavy loads, similar to Belleville disc springs, and resist oxidation, oil, and abrasion.

Janitorial and Cleaning

Scratch-Free Scouring Blocks

Aggressive cleaning without scratching, this scouring block is made of a chemical-resistant foam block with a handle.

Swabs

Clean Room Swabs

Not only are these swabs adhesive and lint free, they also have excellent particle entrapment and the best solvent-holding ability of any swab.

Antistatic Swabs

These swabs dissipate static electricity and are often used for cleaning electronic components.

The quick brown fox jumped over the lazy dog. Pedestal (35" Ht. x 4" Wd. x 4" Dp.)