حلقات O من HNBR | CS 0.21 بوصة × ID 7.475 بوصة | AS568-361 | داش 361 | صلابة 80 (6 / عبوة)

The 80 durometer feels just right for this high-temp application in my hydraulic system. These HNBR rings handled the -40°F start-up test with no issues, which is more than I can say for the last batch I tried.

Finally found an o-ring that actually fits my hydraulic press's gland without being too loose—the 0.21 cross-section seats perfectly. The 80 durometer feels sturdy under pressure, and it held up fine during a steam cleaning cycle near 250°F.

Installed two of these on a high-temp air compressor line where standard nitrile kept failing, and the -40°F to +300°F range has held up perfectly so far. The 80 durometer gives them enough stiffness to seat firmly without being a nightmare to snap into the groove.