... , Needle Bearing DC, HF, HFL, RC, RCB, FC, FCB TSS, B, BB, CSK, TFS Certification: ISO9001:2000 MOQ: 100PCS One Way ... , Needle Bearing, DC, HF, HFL, RC, RCB, FC, FCB, TSS, B, BB, CSK, TFSType DC is a sprag type freewheel cage ... recess.Surface hardness of the finished part should be HRC 60-62, for a deoth of 0.6mm minimum.Main types ... (5C)DC7221BDC7221B(5C)DC7969C(5C)DC8334C One Way Clutch, DC7221 B