Plastic washers/flanges/bushings are suitable for operation in an oil-free environment, which are mostly applied in equipment/machineries of transportation, food production , chemical industrials, marines, papermaking, textile, construction, etc. Temperature range of continuous use for recommended plastics is wide, from 90°C up to 260°C, and the most important is that plastic made washers, flanges, bushings would not be corroded when exposed to chemical solvents. These plastic-made products can last for long service life which would reduce frequency of parts replacement.