This FKM - FPM - Viton® O-Ring has a diameter of 177.4x3.53 mm and is Black in color. The hardness of this O-ring 177.4x3.53 - FKM - FPM - Viton® - 75 Shore A - Black - ORS138885 is 75. 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 250 ºC. O-Rings 123778 are referred to as 138885 and have a DIN 3771 size of 177.4x3.53. This item is equivalent to and has an approval. The chemical name of this O-Ring is Fluorcarbonrubber / Fluorrubber / Fluorpolymeer-elastomeer.