حلقات O-Ring من بونا-نايتريل | AS568-054 | داش 054 | صلابة 70 | أسود (30 / عبوة)

Used these to replace a dried-out seal on a coolant line, and they fit the AS568-054 spec perfectly. The 70 durometer feels firm but not brittle, and so far no leaks at 180°F. Great value for the pack of 30.

Tried these on a hydraulic fitting that always leaked before, and the -40°F rating gave me confidence for winter use. So far no weeping at all, and the 70 durometer seems just right for sealing without being too stiff.

That 70 durometer rating hit the sweet spot — firm enough for my hydraulic lines but not too hard to seat in the groove. They fit perfectly on my shop compressor fittings.