حلقات O من HNBR بقطر داخلي 2.049 بوصة وقطر مقطع 0.103 بوصة | AS568-137 | داش 137 | صلابة 80 (40/عبوة)

Finally found HNBR o-rings that actually hold up in my constant-hot-oil application—the 80 durometer feels just right, not too stiff. Was a bit skeptical about the temperature range, but after a month at 250°F they still look brand new with zero swelling.

I've been running these in a hot hydraulic system that cycles between 150°F and 200°F, and so far no leaks after a week of steady use. The 80 durometer feels firm but not brittle, and the fit on the 2.049" bore was spot-on. Definitely stiffer than Buna-N but worth it for the heat resistance.

The temperature range on these is exactly what my compressor rebuild needed, and the 80 durometer feels properly rigid out of the bag. I've got a full 40-pack to spare for future leaks, which makes the price feel fair for the quality.