حلقات O من Viton FKM | CS 0.139" × ID 1.421" | AS568-221 | داش 221 | X-Ring | صلابة 70 (25 / عبوة)

The 1.421" ID dimensions were spot-on for my assembly, so no wrestling or sloppy gaps. I’ve had these in a hot oil line that hits around 350°F and they’ve held their shape perfectly, no hardening or cracking after a month.

I’ve been using these o-rings for a high-temp pneumatic seal, and they haven't hardened or cracked after repeated cycles up to 350°F. The 70 durometer gives just the right squeeze without being too stiff.

These fit perfectly on the pressure relief valve I'm rebuilding, and the 400°F rating gives me confidence they'll hold up. The 70 durometer feels just right—not too stiff, not too soft.