HERCULES QUAD RING 1-1/16 X 3/32

Four-lobe geometry changes the contact dynamic compared to a round O-ring. Instead of a single continuous contact band, the quad ring seats across two smaller lobes on each face, which reduces the friction load during reciprocating motion and helps prevent the rolling and spiral twist that chews up standard O-rings over time. For a hydraulic cylinder seeing regular back-and-forth movement, that stability usually translates to longer seal life.

For fit, QR-4121 is the Hercules quad ring with a 1-1/16 inch inside diameter and a 3/32 inch cross section, and it is called out as a direct fit for standard groove dimensions made for that size range.