This HNBR O-Ring has a diameter of  mm and is Black in color. The hardness of this O-ring 37.5x3.55 - HNBR - 80 Shore A - Black - ORS198640 is 80. Alternative names for the compound are Hydrogenated Nitrile Butadiene Rubber, and it is commonly produced by Therban® | Zetpol® | Zhanber® | Tornac®. The O-Ring is typically used in and has an operating temperature range from -25 ºC to 150 ºC. O-Rings 1281377 are referred to as 198640 and have a DIN 3771 size of . This item is equivalent to and has an approval. The chemical name of this O-Ring is Gehydrogeneerd Nitrilbutadiënrubber.