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Cast Iron Piston Ring, 6.00 Inch OD, 0.311 Inch Width, 0.20 Inch Wall Thickness

Description & Features

Manufactured from cast iron, this Cast Iron Piston Ring, 6.00 Inch OD, 0.311 Inch Width, 0.20 Inch Wall Thickness is designed for use in hydraulic cylinders and industrial piston assemblies where reliable sealing under dynamic conditions is required. The 6.00-inch outer diameter suits larger bore cylinder applications, while the 0.311-inch width and 0.20-inch radial wall thickness provide a well-proportioned sealing profile.

Cast iron construction offers good wear resistance and dimensional stability across a range of industrial service conditions. Groove dimensions must account for minimum depth and width clearances to allow the ring to compress freely without bottoming, and radial clearance between the bore and piston should be maintained at less than one-third of the ring's wall thickness to preserve sealing effectiveness. This ring is supplied by Hercules Sealing Products under catalog number C1DL12.

SKU: SPR-6004

Supplier Part Number (MPN): SPR-6004

Alternate Part Numbers: C1DL12

Specifications

Brand Hercules Sealing Products	Brand Hercules Sealing Products	Pack Size 1.00	UOM EA	O.D. 6 in	Supplier Part Number SPR-6004	Wall Thickness 0.20	Product Weight 0.29 lbs	Alternate Part Numbers Alternate Part Number C1DL12

Similar Products

Model Number	O.D.	Width (in)	Wall Thickness
SPR-4002 Cast Iron Piston Ring	4 in	0.187	0.135
SPR-6004 Cast Iron Piston Ring	6 in	0.311	0.199
SPR-7002 Cast Iron Piston Ring	7 in	0.249	0.236

Product Questions & Answers (1)

Question by: Peggy H on Dec 29, 2025, 1:12 PM

groove depth and width requirements for a 6 inch cast iron piston ring, what am I looking at here?

Answer by: Customer Support on Dec 31, 2025, 6:49 AM

For the groove depth, it needs to be at least 0.015 inches deeper than the maximum radial wall thickness of the ring, with a tolerance of positive 0.003 and negative zero inches. That clearance keeps the ring from bottoming out when it compresses down to working diameter. On the width side, the groove has to be at least 0.001 inches wider than the maximum ring width, same tolerance range. Both of those minimums are there so the ring can move and seat the way it needs to without binding up in the groove.