حلقة O من PTFE | CS 0.139 بوصة × ID 2.484 بوصة | AS568-230 | Dash 230 | 23 صلابة (14 / عبوة)

The softer 23 durometer PTFE was the key for me—it sealed a stubborn hydraulic fitting that harder o-rings couldn't handle. These handled the -350°F cryogenic test in our lab without any cracking.

Finally, a Dash 230 that actually holds up at the sub-zero temps I work with—these PTFE rings don't get brittle like the rubber ones did. The 23 durometer is noticeably stiffer but seals perfectly in my cryogenic valve.

I've been using these PTFE o-rings for a high-temp sealing application, and the 23 durometer is surprisingly pliable for a Teflon material—they seated perfectly without any cracking. The -350°F to +500°F range gives me confidence they'll hold up in extreme conditions. Definitely worth the price for