حلقات O من بونا-ن نيتريل بقطر داخلي 1.162" وقطر مقطع 0.21" | AS568-321 | داش 321 | صلابة 70 | أسود (300 / عبوة)

Had to replace the worn seals in a pneumatic cylinder and these fit the groove perfectly on the first try. The 70 durometer feels firm but not brittle, and the -40°F rating gives me confidence for the cold storage line. No leaks after a week of cycling.

Exactly the right size for my hydraulic rebuild—the 1.162" ID seated perfectly in the groove with no slop, and the 70 durometer gives them a solid, firm feel that should handle the 250°F service range without worry.

Pulling these out of the package, the 70 durometer rubber feels dense and durable, not flimsy like some cheaper o-rings I've used. They seated snugly in my hydraulic fitting without any twisting, and the black finish looks clean. I ordered the 300-pack for a long-term project, and at this price per