This FKM - FPM - Viton O-Ring has a diameter of 27.7x3.5 mm and is Green in color. The hardness of this O-ring 27.7x3.5 - FKM - FPM - Viton - 75 Shore A - Green - ORS205603 is 75 Shore A. Alternative names for the compound are Viton® - FKM, and it is commonly produced by Viton® - Du Pont - 3M - Solvay - Daikin. The O-Ring is typically used in and has an operating temperature range from -15 ºC to 200 ºC. O-Rings 319994 are referred to as 205603 and have a DIN 3771 size of 27.7x3.5. This item is equivalent to and has an approval. The chemical name of this O-Ring is Fluorocarbon Rubber.