حلقات O من السيليكون 0.07" CS × 3.489" ID | AS568-043 | داش 043 | متوافقة مع FDA | صلابة 70 | أحمر (55/عبوة)

I needed a reliable seal for a hot water application, and these FDA-compliant rings handle the 450°F max perfectly without any melting or deformation—they fit snugly first try. The 70 durometer silicone is soft enough to seat easily yet firm enough to hold pressure.

The -80°F temperature rating gives me confidence using these in a freezer application, and the red color makes them easy to spot during maintenance. They fit perfectly on my 3.5-inch diameter fittings.

Installed these on a high-heat application where standard Buna-N would've melted, and the 450°F rating handled it easily. The 70 durometer feels just right for a snug seal without being too stiff.