got a cylinder gland that takes an o-ring around 4-3/8 OD and 3/16 thick, is this the right size or am i readin it wrong
Question by: Steve D on Jul 20, 2025, 8:03 AM
Outer diameter and cross-section are the two key callouts on this one. It is a Hercules O-ring with a 4-3/8 inch OD and a 3/16 inch cross-section width, so it matches what you described if your seal spec is based on those two dimensions.
Answer by: Customer Support on Jul 22, 2025, 6:09 AM
got a cylinder that takes a 4-3/8 inch OD o-ring with a 3/16 cross section, does this Hercules one match up to that?
Question by: Clint S on Feb 3, 2026, 10:23 AM
That's what this one is sized for. The outer diameter is 4-3/8 inches and the cross-section width is 3/16 inches, so if your cylinder calls for those dimensions, you're looking at the right part. Hercules Sealing Products makes these for hydraulic and fluid power applications, cylinders included.
Answer by: Customer Support on Feb 5, 2026, 6:37 AM
Hey, will this here O-ring work alright in a hydraulic cylinder? Just need to make sure it's the right size.
Question by: Rusty B on Dec 3, 2025, 8:46 PM
Based on the specs, this Hercules O-ring has an outer diameter of 4-3/8 inches and a width of 3/16 inches. So, if those dimensions match what you need for your cylinder, it should be a good fit.
Answer by: Customer Support on Dec 5, 2025, 6:13 AM
