... ,RNA,HK seriesF) Thrust ball bearing: 51100, 51200,51300, 51400 seriesG) Automobile bearing: Wheel Hub bearing, water pump bearing, clutch release bearing, air-condition bearingH) Angular ... ,SF,PA,SFK SeriesJ) Non-standard/special bearing: Various Non-standard/special bearing7 Material: carbon steel, chrome steel, stainless steel and ceramic ...