حلقات O من HNBR بقطر مقطع 0.103 بوصة × قطر داخلي 0.986 بوصة | AS568-120 | داش 120 | صلابة 80 (80 / عبوة)

I used these in a high-temp engine gasket repair and the 300°F rating gave me confidence they’d hold up. The cross-section thickness feels just right for a snug fit without being too stiff to install.

The 80 durometer hardness is exactly what I needed for a high-pressure fitting, and they slid on without any tearing. HNBR handles the heat range well, so I'm confident they'll last in my hot oil application.

I've been running these o-rings in a hydraulic actuator that sees 275°F cycles, and the 80 durometer holds up better than the standard Buna-Ns I used before. No signs of hardening or cracking after a week of constant heat.