... TSS, B, BB, CSK, TFS Certification: ISO9001:2000 MOQ: 100PCS One Way Clutch, Needle Bearing, DC, HF, HFL, RC, RCB, FC, FCB ... races must both have a minimum plain width "e", with out any recess.Surface hardness of the finished part should be ... (4C)DC5476C(4C)DC5776ADC6334BDC7221(5C)DC7221BDC7221B(5C)DC7969C(5C)DC8334C One Way Clutch, DC7221 B