حلقات O-Ring من Viton FKM | قطر مقطع 0.21 بوصة × قطر داخلي 1.6 بوصة | AS568-326 | داش 326 | صلابة 75 | بني (25 / عبوة)

I needed a high-temp seal for a steam line and these FKM rings tolerate up to 400°F, which is exactly why I picked them. The 1.6" inner diameter fit my fitting perfectly with no stretching hassle. They've been on for a week with zero leaks and the brown color makes them easy to spot during inspectio

These are holding up perfectly under the constant 350°F heat near my boiler, which is exactly what I needed for that application. The 75 durometer feel is just firm enough without being brittle, and they fit the groove snugly.

The brown color makes them easy to spot during assembly, and the 75 durometer feels firm but pliable enough to seat without tools. I’ve had these in a steam line at 350°F for two weeks now with zero leaks, which is more than I can say for the cheaper nitrile ones I tried before.