حلقات O-Ring من Viton FKM بقطر داخلي 0.549 بوصة وقطر خارجي 0.103 بوصة | AS568-113 | داش 113 | صلابة 90 (400/عبوة)

These fit perfectly on my hydraulic press fittings and the 90 durometer feels sturdier than the standard ones I've used before. The -15° to +400°F range gives me confidence they'll hold up under high heat cycles.

Replacing the worn seals on a heat exchanger was a pain until these came in, the -15°F to +400°F range gives me real confidence. The 90 durometer hardness feels sturdy and they seated perfectly into the grooves without any twisting.

Finally found a high-temp o-ring that doesn't harden up after a season—these Viton ones handle the 400°F in my compressor just fine. The 0.103" cross-section fits the groove perfectly, and a pack of 400 means I won't run out anytime soon.