حلقات O من Viton FKM 0.139 بوصة CS × 3.609 بوصة ID | AS568-239 | داش 239 | حلقة X | صلابة 70 (8 / عبوة)

Installed these in a hot water valve that kept leaking with standard rubber rings — the Viton held up perfectly at 200°F with no softening. Measured them and the 3.609" ID was dead on.

I needed o-rings that could handle high heat near a furnace, and these Viton ones are holding up perfectly at over 350°F. The 3.609" ID fit snugly into the groove without any stretching issues.

Worked perfectly for sealing a high-temp manifold on my hydraulic press; the 70 durometer hardness gave just the right squeeze without being too stiff. So far holding up well under constant 300°F heat cycles with no swelling or leaks.