440C Stainless Steel Frame and Ball Bearing LM8LUU, LM10LUU, LM12LUU, LM16LUU, LM20LUU, Nylon Retainer. 440C SUS retainer, frame and ball bearings LM8GA, LM10LGA, LM12LGA, LM16LGA, LM20LGA. SUS304 is austenitic stainless steel with good plasticity and good cold workability. At the same time, due to ...