حلقات O-Ring HNBR 0.21" CS X 5.225" ID | AS568-352 | داش 352 | صلابة 80 (7 / عبوة)

Installed these on a hydraulic pump flange that sees some heat, and the 80 durometer material handled the pressure without any issues. The cross-section feels noticeably thicker than generic o-rings I've used.

These fit perfectly on the swivel joint I was rebuilding, and the 80-durometer hardness gives them a solid feel that should hold up under pressure. The -40°F rating is what sold me since my equipment sits outside all winter. Exactly what I needed for the job.

Had to swap out a worn seal on a hydraulic fitting that's exposed to some serious heat, and these HNBR rings are holding up far better than the old ones did. The 5.225" inner diameter was a perfect match, and the 80 durometer feels nice and firm. No leaks since install, which is exactly what I neede