حلقات O من Viton FKM | 0.139" CS X 1.234" ID | AS568-218 | داش 218 | مقطع مربع | صلادة 70 (40 حلقات/عبوة)

Finally got around to replacing the old round-profile seals in my hydraulic press with these square ones, and they seat perfectly without rolling. The viton material handles the 200°F operating temperature without any swelling or hardening after a week of heavy use.

I'm using these square profile rings in a high-temp pneumatic fitting, and the 70 durometer feels just right for a snug seal without being too hard to install. They've held up perfectly under continuous 300°F exposure so far.

I’ve used these o-rings in a high-temp pump application, and they’ve held up perfectly against continuous exposure to aggressive fluids. The Viton material seems tougher than standard nitrile—no swelling or cracking after a month. Solid value for a 40-pack.