Sealing Rings
How to Specify FEY Laminar Rings – FK5 Single & Double Wound
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![specify-fk5sealingrings2](https://www.fey-na.com/wp-content/uploads/specify-fk5sealingrings2.jpg)
FEY FK5 part numbers are a combination of the Series, Style, Bore/Shaft diameter (D), Opposing dimension, Set thickness, and Ring material. A special part number is assigned to ring sizes that have special features like coatings or surface finishes.
![specify-fk5sealingrings3](https://www.fey-na.com/wp-content/uploads/specify-fk5sealingrings3.jpeg)
The following is an example of a FEY Part Number:
![specify-fk5sealingrings4](https://www.fey-na.com/wp-content/uploads/specify-fk5sealingrings4.jpeg)