حلقات O-Ring HNBR بقطر داخلي 0.21" × 2.85" | AS568-336 | داش 336 | صلابة 90 (8/عبوة)

I needed a high-temp seal for a hydraulic fitting on a piece of equipment that runs near 250°F, and these HNBR rings are holding up perfectly without any visible wear. The fit on the groove is snug but not overly stiff, sealing the connection without any leaks. A solid choice for anyone dealing with

The 90 durometer HNBR compound feels noticeably stiffer than standard Buna, which is exactly what I needed for a high-heat application up to 300°F. Fit on the 2.85" bore was snug and leak-free on the first try, and the pack of eight gives me plenty of spares for the price.

After replacing the factory seals on my hydraulic press, these HNBR rings held up perfectly through several high-temp cycles without any deformation. The 90 durometer feels noticeably firmer than standard Buna-N, which is exactly what I needed for this application.