This FEP-FKM - FPM - Viton® O-Ring has a diameter of 31x2 mm and is Black - Translucent in color. The hardness of this O-ring 31x2 - FEP-FKM - FPM - Viton® - FDA - Black - Translucent - ORS113646 is . Alternative names for the compound are FEP - Viton® - FKM / FEP encapsulated Viton® - FKM, and it is commonly produced by Teflon® FEP | Neoflon® FEP | Dyneon® FEP. The O-Ring is typically used in and has an operating temperature range from ºC to 205 ºC. O-Rings 6522752 are referred to as 113646 and have a DIN 3771 size of 31x2. This item is equivalent to and has an FDA approval. The chemical name of this O-Ring is Gefluoreerd Ethyleen-Propyleen-Copolymeer / Fluorcarbonrubber.