حلقات O من مطاط النتريل بونا | AS568-904 | داش 904 | صلابة 90 (1300 / عبوة)

These handled the -40°F range exactly as the spec sheet said, which was the main reason I picked them over cheaper options. Tore through a box of 1300 on a rebuild job without a single bad seal, and the 90 durometer feel gives me confidence they'll hold up under pressure.

Installing a set of these dash 904 o-rings for a hydraulic line rebuild was straightforward, and the 90 durometer feels noticeably stiffer than the standard ones I've used. The temperature range down to -40°F gives me confidence for winter equipment operation.

I've been using these o-rings to replace worn seals in a hydraulic system, and the -40°F to +250°F temperature range is exactly what I needed for outdoor equipment. They fit the groove perfectly and feel durable.