حلقات O من بونا-ن نيترايل 0.139 بوصة CS × 4.484 بوصة ID | AS568-246 | داش 246 | صلابة 90 (100/عبوة)

The 90-durometer hardness on these o-rings is exactly what I needed for a high-pressure pneumatic seal; they fit the groove perfectly without any deformation. I installed a few on a hydraulic cylinder and the leak stopped immediately, even at 150°F operating temp. The 100-piece pack gives me plenty

Finally got around to rebuilding my pneumatic cylinder and the 90-durometer material on these o-rings gives a nice firm seal without being impossible to install. The 4.484" ID slips right over the piston with zero play, exactly what I needed for that application.

The 4.484" inner diameter fits my hydraulic cylinder perfectly, and the 90 durometer feels firm enough to hold pressure without being too brittle. I've had them sitting on a hot pump housing for a week now with no signs of degradation.