Hub O-Ring Grand National Single

The PEM Hub O-Ring Grand National Single (part number GNHOR) is a precision replacement o-ring assembly engineered for hub applications requiring reliable sealing in demanding field conditions. Manufactured by PEM, a recognized innovator in fastening and sealing solutions, this single o-ring is designed to maintain integrity under operational stress where fluid containment and leak prevention are critical to equipment reliability.

With nominal dimensions of 5 inches inner diameter and 4.75 inches outer hub specification, this o-ring sealing assembly is sized for hub bore applications typical in mechanical assemblies, rotational equipment, and fluid transfer systems. The lightweight 0.04 lb construction makes it suitable for integration into compact assemblies where weight management matters. PEM's precision molding ensures consistent elastomer properties across thermal ranges and repeated compression cycles—critical factors in applications where seals are subjected to cyclic stress or temperature fluctuation.

This replacement o-ring serves maintenance and repair roles across industrial, automotive, and equipment sectors. Users performing hub seal replacement, fluid system refurbishment, or equipment restoration benefit from a verified OEM-specification component that restores original sealing performance without system redesign. The Grand National designation indicates compatibility with hub configurations meeting that standard specification, making it a direct substitute for worn or compromised original seals.

When equipment seals degrade, fluid leakage and operational downtime follow. This PEM o-ring replacement addresses that need with a single, ready-to-install component backed by PEM's manufacturing precision. Whether stocking maintenance supplies or performing targeted repairs, this hub o-ring delivers the verified dimensional and material consistency required for immediate system restoration.