This HNBR O-Ring has a diameter of 253x5.34 mm and is Black in color. The hardness of this O-ring 253x5.34 - HNBR - LT55 / AED - 90 Shore A - Black - ORS197460 is 90 Shore A. Alternative names for the compound are Hydrogenated nitrile rubber, and it is commonly produced by . The O-Ring is typically used in and has an operating temperature range from 7146 ºC to 7146 ºC. O-Rings 1055197 are referred to as 197460 and have a DIN 3771 size of 253x5.34. This item is equivalent to and has an LT55 / AED approval. The chemical name of this O-Ring is Hydrogenated Nitrile Butadiene Rubber.