This FKM - FPM - Viton® O-Ring has a diameter of 256x1.78 mm and is Black - Translucent in color. The hardness of this O-ring 256x1.78 - FKM - FPM - Viton® - FDA - Black - Translucent - ORS173218 is . Alternative names for the compound are Viton® - FKM, and it is commonly produced by Viton® | Tecnoflon® | Fluorel® | Dai-El® | Fluon®. The O-Ring is typically used in and has an operating temperature range from -20 ºC to 205 ºC. O-Rings 6522800 are referred to as 173218 and have a DIN 3771 size of 256x1.78. This item is equivalent to and has an FDA approval. The chemical name of this O-Ring is Fluorcarbonrubber / Fluorrubber / Fluorpolymeer-elastomeer.