This HNBR O-Ring has a diameter of  mm and is Black in color. The hardness of this O-ring 51.85x2 - HNBR - 70 Shore A - Black - ORS232440 is 70. 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 878143 are referred to as 232440 and have a DIN 3771 size of . This item is equivalent to and has an approval. The chemical name of this O-Ring is Hydrogenated nitrile rubber.