حلقات O من بونا-ن نيترايل | CS 0.21" × ID 1.975" | AS568-329 | داش 329 | صلابة 90 (150/عبوة)

I needed something tougher for my hydraulic fittings, and the 90 durometer rating on these o-rings has held up perfectly under pressure. The 1.975" ID is exactly right for the groove depth I'm working with, and the package of 150 gives me plenty of spares.

These 90-durometer o-rings are holding up great in my air compressor rebuild, the material feels dense and durable. For the price per pack of 150, it's hard to beat this value for standard AS568 sizes.

The 1.975" inner diameter fits perfectly on my hydraulic cylinder gland, and the 90 durometer stiffness makes them hold their shape even when I'm wrestling them into place. I've had these in service for a few weeks now with hot oil and no leaks or swelling.