This FFKM - FFPM O-Ring has a diameter of 53.8 x 4 mm and is Black in color. The hardness of this O-ring 53.8x4 - FFKM - FFPM - F757ZLT - Low Temp (>-40°C) - 75 Shore A - Black - ORS220422 is 75 Shore A. Alternative names for the compound are FFKM – FFPM, and it is commonly produced by . The O-Ring is typically used in and has an operating temperature range from -40 ºC to 250 ºC. O-Rings 622067 are referred to as 220422 and have a DIN 3771 size of 53.8 x 4. This item is equivalent to and has an Low Temp (>-40°C) approval. The chemical name of this O-Ring is Perfluoroelastomer.