This FEP-FKM - FPM - Viton O-Ring has a diameter of  mm and is Black in color. The hardness of this O-ring 420x5 - FEP-FKM - FPM - Viton - FDA - Shore A - Black - ORS223831 is Shore A. Alternative names for the compound are FEP - Viton® - FKM / FEP encapsulated Viton® - FKM, and it is commonly produced by Teflex FEP-O-SEAL®. The O-Ring is typically used in and has an operating temperature range from -15 ºC to 200 ºC. O-Rings 6592585 are referred to as 223831 and have a DIN 3771 size of . This item is equivalent to and has an FDA approval. The chemical name of this O-Ring is Teflon® fluroropolymer - Viton.