0.139" CS X 4.234" ID حلقات O من HNBR | AS568-244 | داش 244 | صلابة 90 (10/عبوة)

I needed a 4.234" ID seal that could survive hot transmission fluid, and the 90-durometer HNBR hasn't let me down. Fit the groove perfectly out of the package, and I’m grabbing another pack just to keep on the shelf.

The 90-durometer hardness gives these a firm, stable feel when seated, and the HNBR handles heat without softening. Slid them into a hot-oil application at around 280°F and they've held their shape perfectly so far.

These o-rings fit perfectly on my hydraulic cylinder and the 90 durometer feels noticeably firmer than standard 70. I'm confident they'll hold up well to the heat and pressure in my application.