حلقات O من HNBR بقطر داخلي 3.359" وقطر مقطع 0.139" | AS568-237 | داش 237 | صلابة 90 (12 / عبوة)

These fit perfectly in my hydraulic cylinder repair kit, and the 300°F temp rating gives me confidence they'll hold up under hot oil. The AS568-237 size matched the original seal exactly.

The cross-section is exactly 0.139" as spec'd, so these seat perfectly in my groove without any fiddling. I've had them in a hot oil application hovering near 300°F for three weeks now and they're holding up like champs.

The 90-durometer HNBR handles the higher pressures in my hydraulic cylinder without any squeezing out. These specific AS568-237 dimensions were exactly what I needed to seal a worn pump shaft.