حلقات O من مطاط بونا-إن (Nitrile) | AS568-051 | داش 051 | صلابة 70 | أسود (30/عبوة)

The 70 durometer hardness is perfect for my low-pressure air fittings—they seal tight without being too stiff to install. I've used them on several projects and they hold up well even with minor temperature swings.

Finally got around to replacing the old o-rings on my hydraulic fitting and these 70 durometer Buna-N ones sealed up perfectly on the first try. The pack of 30 gives you plenty of spares for future projects.

I needed a few of these for a quick plumbing repair and the -40°F to +250°F range gives me confidence they’ll hold up in my hot water line. They fit the groove snugly and the black Buna-N material feels durable. No leaks so far after a week of use.