Answer
Mar 24, 2026 - 08:07 AM
To measure an O-ring for boss fittings, first measure the inside diameter (ID) of the O-ring by placing it on a flat surface and using a ruler or caliper. Then measure the cross-sectional diameter by placing the O-ring between the jaws of the caliper and gently closing it to get the thickness. These two measurements will help you determine the correct size for the O-ring.
