حلقات O من بونا-ن نيتريل | CS 0.139" × ID 7.984" | AS568-268 | داش 268 | صلابة 70 | أسود (40/عبوة)

The 0.139" cross-section fit perfectly into the groove on my pressure washer pump. It seals nicely at 250°F, which was a worry with cheaper alternatives I've tried. For the price of a 40-pack, this was a no-brainer.

Needed a reliable o-ring for a hydraulic cylinder rebuild, and the 70 durometer material held up perfectly under pressure. The 0.139" cross-section fit the groove snugly, no leaks at all. Exactly what I needed for the job.

The 7.984" inner diameter slipped onto my pulley shaft without any wrestling match, and the 70 durometer grips firmly enough that I didn’t need a drop of sealant. These Buna-N rings arrived with a clean, uniform surface—no flash or rough edges—and the package count matched exactly, so I’ve already g