حلقات O-Ring من بونا-ن نيترايل | 0.139" CS X 1.421" ID | AS568-221 | داش 221 | مقطع مربع | صلابة 70 (250 / عبوة)

The square profile is a nice change from round o-rings—it seated firmly in my groove without rolling around during assembly. The 70 durometer hardness gave me confidence it'll hold up in the -40°F range I'm working with.

The 70 durometer feels just right for my hydraulic fittings—not too soft, not too stiff. These square profile o-rings seated perfectly and held pressure on the first try. Exactly what I needed for a reliable seal in high-temp applications.

The square profile on these o-rings seated perfectly into the groove on my hydraulic cylinder, and the 0.139" cross-section gave it a much more secure fit than the round ones I've used before.