حلقات O-Ring HNBR 0.21 بوصة CS × 2.1 بوصة ID | AS568-330 | داش 330 | صلابة 90 (12 / عبوة)

The 90 durometer hardness is exactly what I needed for a high-pressure seal, and they fit the groove perfectly without any wrestling. I've got a spare set on the bench because at this price for twelve, it's a no-brainer to keep them stocked.

These handled the 200°F transmission fluid in my tractor's PTO seal without any swelling, a big improvement over the Buna-N ones I used before. The 90 durometer feels noticeably firmer during installation, too.

The 90 durometer on these HNBR o-rings made a noticeable difference sealing my hydraulic fitting where standard ones always leaked. They slid in easily and haven't budged despite the heat cycling around 250°F.