This NBR - Nitrile O-Ring has a diameter of 66.4x1.78 mm and is Black in color. The hardness of this X-ring 66.4x1.78 - NBR - Nitrile - 90 Shore A - Black - ORS193919 is 90 Shore A. Alternative names for the compound are Nitrile Rubber - NBR, and it is commonly produced by . The O-Ring is typically used in and has an operating temperature range from -30 ºC to 135 ºC. O-Rings 1327546 are referred to as 193919 and have a DIN 3771 size of 66.4x1.78. This item is equivalent to and has an approval. The chemical name of this O-Ring is Acrylonitrile butadiene rubber.