Designed for dynamic and static sealing applications, the Hercules Quad Ring 1-1/16 X 3/32 is a four-lobed sealing element that offers improved sealing performance over standard O-rings in many hydraulic and industrial environments. The four-lobe profile reduces rolling and spiral twist in dynamic applications, providing more stable contact with mating surfaces and lower friction during reciprocating motion.
Manufactured by Hercules Sealing Products, this quad ring suits use in hydraulic cylinders, pumps, valves, and similar fluid power components where consistent sealing integrity is required. The 1-1/16 inch inside diameter and 3/32 inch cross-section make it a direct fit for standard groove dimensions designed for that size range.
SKU: QR-4121
Supplier Part Number (MPN): QR-4121
Alternate Part Numbers: C1FC88, MI-01234949, MINO-00407X70525
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Specifications
Alternate Part Numbers
Alternate Part NumberC1FC88, Alternate Part Number MI-01234949, Alternate Part Number MINO-00407X70525
Brand
Hercules Sealing Products
Brand
Hercules Sealing Products
Pack Size
1.00
UOM
EA
Supplier Part Number
QR-4121
Product Weight
0.01 lbs
Product Questions & Answers (2)
Question by: Howard J on Dec 13, 2025, 7:30 PM
Got a cylinder that's been eating through standard O-rings way faster than it should. Would swapping in a quad ring like this one help cut down on that wear?
Answer by: Customer Support on Dec 15, 2025, 6:47 AM
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.
Question by: Lance R on May 8, 2025, 8:38 PM
got a groove set up for a 1-1/16 ID seal with a 3/32 cross section. is QR-4121 the right quad ring for that
Answer by: Customer Support on May 9, 2025, 8:48 PM
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.
