حلقات O من مطاط النتريل بونا-إن | AS568-433 | داش 433 | صلابة 70 | أسود (35 / عبوة)

Had to replace a leaky fitting on an air line that sees some pretty cold winter temps, and these AS568-433s handle the -40°F rating with no problem. The 70 durometer hardness made them easy to seat without being flimsy, and the bag of 35 means I've got plenty of spares for next time.

The compound feels really durable, and these have held up well in my pneumatic setup where other rings would dry out. The 70 durometer is just right for a tight seal without being too stiff.

Exactly the right size for my hydraulic repair job—the AS568-433 fit snug without any wrestling. I've got them sitting in a hot garage all summer and they haven't hardened a bit, which matches that 250°F rating.