حلقات O-Ring HNBR 0.139" CS × 1.734" ID | AS568-224 | داش 224 | صلابة 80 (35/عبوة)

The 80 durometer stiffness is exactly right for my application, not too squishy but seals with a firm bite. I’ve had these sitting in my garage through a hot summer and cold winter, and the box says -40°F to +300°F, which gives me confidence they’ll hold up. These are the first HNBR rings I’ve tried

Finally, a 224 o-ring that doesn't feel like it's going to crack after a season of heat. The 80 durometer hardness is noticeably firmer than the cheap ones I've used, and the 1.734" ID seated perfectly in my gland.

The temperature range is spot on for my hydraulic setup, and the 80 durometer feels firm but not brittle. I've used cheaper nitrile rings before, but these HNBR ones seem way more resistant to the heat and oil I'm throwing at them.