FKM O-ring yana nufin Fluoroelastomer O-ring wanda shine nau'in roba na roba wanda aka yi daga fluorine, carbon, da hydrogen.An san shi da kyakkyawan juriya ga yanayin zafi, matsananciyar sinadarai, da mai wanda ya sa ya zama sanannen zaɓi don rufe aikace-aikacen a cikin masana'antu kamar kera motoci, sararin samaniya, da sarrafa sinadarai.FKM O-rings kuma an san su don dorewa, elasticity, da juriya ga saitin matsawa.