حلقات O من فيتون FKM 0.21" CS × 5.475" ID | AS568-353 | داش 353 | صلابة 90 (12 / عبوة)

Got these for a hydraulic cylinder rebuild on a press that runs hot, and the 90 durometer feels much more durable than standard Buna-N. The 5.475" ID fit perfectly on the first try, and they've held up through several cycles so far.

I needed a high-temp seal for a steam application, and these Viton FKM o-rings hold up perfectly at 400°F. The 5.475" inner diameter fit my groove like a glove, and the 90 durometer feels solid.

The 90 durometer rating gives these o-rings a firm, positive seal without being too hard to stretch into place. I used them to replace a failing gasket on a steam valve and they’ve held up perfectly through several heat cycles. Much better than the generic ones I tried before.