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Measuring a Full Face Gasket (also referred to as a flange gasket) can seem confusing.  It is critical to accurately measure 5 points on the Flange or Full Face Gasket to ensure your custom gasket is cut accurately and to your specifications.  The 5 critical measurement points are:

• Inside Diameter (ID)
• Outside Diameter (OD)
• Number of Holes
• Size of the Hole
• Bolt Circle Diameter