حلقات O-Ring من بونا-إن نيتريل | 0.139" CS × 3.984" ID | AS568-242 | داش 242 | صلابة 70 | أسود (150/عبوة)

The 0.139" cross-section feels substantial and seals perfectly in my air compressor line. This batch of 150 should last me years.

The temperature range is what sold me, since my application sees some serious heat and cold swings. These 3.984" ID rings seated perfectly into the groove with no stretching issues, and the 70 durometer gives just the right amount of firmness. I'll be ordering these again.

That 0.139" cross-section was exactly what I needed to seat properly in a deep groove on an old hydraulic cylinder. They stretched into place without tearing and the pack of 150 should last me for years.