Save now when you buy the Ridgid 11398 1/4 X 9/16 X 1/16 Washer while it's still in stock online at PlumbersStock. This Washer is a genuine replacement part that measures 1/4 X 9/16 X 1/16. It is made of high-quality materials for durability and excellent performance. Ridgid is a trusted name for good reason. They have earned their reputation with quality manufacturing.