حلقات O من بونا-ن نيتريل 0.139" CS × 3.859" ID | AS568-241 | داش 241 | صلابة 90 (125/عبوة)

Was looking for a large o-ring to replace a leaky gasket on my home air compressor, and these nitrile ones handled the 150 psi without any issues. The 3.859" inner diameter fit snugly into the groove, and the package of 125 gives me plenty of spares for future repairs.

The 90 durometer hardness makes these feel sturdier than the softer rings I've used before, which is exactly what I needed for a higher-pressure seal. They seated properly and haven't shown any signs of wear after a few weeks of use, though I do wish they came in smaller bulk quantities.

These o-rings fit perfectly on a hydraulic ram repair I was doing. The 90 durometer feels sturdier than the old ones, and the -40°F rating gives me confidence for cold weather. Only minor thing is the package count was right but the bag had a small tear.