This NBR - Nitrile O-Ring has a diameter of  mm and is Black in color. The hardness of this O-ring Cord 4mm - NBR - Nitrile - 90 Shore A - Black - ORS278097 (per Meter) is 90 Shore A. Alternative names for the compound are , and it is commonly produced by . The O-Ring is typically used in and has an operating temperature range from -30 ˚C to 135 ˚C. O-Rings 76156 are referred to as 278097 and have a DIN 3771 size of . This item is equivalent to and has an approval. The chemical name of this O-Ring is Acrylonitrile butadiene rubber.