حلقات O-Ring من مطاط الفيتون FKM | قطر المقطع 0.139" × القطر الداخلي 0.859" | AS568-212 | داش 212 | صلابة 90 (150 / عبوة)

These fit perfectly on the high-temp hydraulic fittings I'm rebuilding. The 90 durometer feels noticeably firmer than the standard ones I've used before.

I needed o-rings that could handle the heat cycling in my hydraulic press, and these FKM ones haven't hardened or cracked after several months near the 400°F mark. The 90 durometer gives them a firm, reliable feel when compressed into the gland.

Used these in a hot oil application that peaked around 350°F and they held up without any softening or swelling. The -15°F lower limit is a nice bonus for our colder winter shutdowns, and the 150-count pack means I won't run out mid-job.