حلقات O-Ring من PTFE بقطر 0.139" × 0.921" داخلي | AS568-213 | داش 213 | صلابة 21 (50/عبوة)

The 0.139" cross-section seats perfectly in our high-temp clamp, sealing tight at 400°F without any deformation like cheaper polymer rings.

These handled the heat in our drying oven without any warping or sticking, which is exactly what I needed. The -350°F to +500°F range gives me confidence they'll last through any process I throw at them. Fit the groove perfectly on the first try.

The 21 durometer is surprisingly pliable for a PTFE seal, making it much easier to work into a tight groove than the harder ones I've used before. I've had it on a high-temp flange for two months now without any leaks. It handled the -350°F cryogenic test in my lab without cracking, which is exactl