This HNBR O-Ring has a diameter of 26.57 x 3.53 mm and is Black in color. The hardness of this O-ring 26.57x3.53 - HNBR - 70 Shore A - Black - ORS186540 is 70 Shore A. Alternative names for the compound are Hydrogenated Nitrile Butadiene Rubber, and it is commonly produced by Lanxess - Zeon - and LG Chem. The O-Ring is typically used in and has an operating temperature range from -25 ºC to 150 ºC. O-Rings 876983 are referred to as 186540 and have a DIN 3771 size of 26.57 x 3.53. This item is equivalent to and has an None approval. The chemical name of this O-Ring is Hydrogenated nitrile rubber.