حلقات O-Ring من فيتون FKM #0.139 بوصة CS × 0.421 بوصة ID | AS568-205 | داش 205 | صلابة 75 | بني (200/عبوة)

The heat tolerance is real—I've had these in service at 350°F for weeks and they haven't hardened or cracked. The 0.421" inner diameter seated perfectly in my groove without any stretching issues. For a 200-pack at this price, the quality is honestly better than I expected.

Finally, a Viton FKM O-ring that actually withstands the heat in my compressor setup without degrading. The 0.139" cross-section feels robust and the package of 200 gives plenty of spares. Exactly what I needed for a reliable seal in a high-temp application.

The 75 durometer hardness gives these a nice firm feel when seating them in the groove. They fit my standard 0.421" ID application perfectly, though the package of 200 is more than I'll ever need.