This FFKM - FFPM O-Ring has a diameter of  mm and is Black in color. The hardness of this O-ring 44.45x3.53 - FFKM - FFPM - F757ZLT - Low Temp. (-40°C) - 75 Shore A - Black - ORS287448 is 75. Alternative names for the compound are FFKM – FFPM, and it is commonly produced by Kalrez® | Simriz® | Chemraz® | Perlast® | Isolast® | Parofluor®. The O-Ring is typically used in and has an operating temperature range from -40 ºC to 270 ºC. O-Rings 621542 are referred to as 287448 and have a DIN 3771 size of . This item is equivalent to and has an Lage Temp. (-40°C) approval. The chemical name of this O-Ring is Perfluorcarbonrubber / Perfluoroelastomeer.