... bearing ISO 9001:2000 certificate Chrome/Stainless steel thrust needle roller bearing/thrust needle bearings/thrust needle bearingThrust needle bearing1. Material: Chrome steel ... WS,NTA,TRA,TRB,TRC,TRD,K811,K812,AXW)Series8) Roller and cage assemblies (K,KT,KBK,KZK,KZW)Series9) ... Heavy duty roller bearing (NA,NK,NKI,NAV,NAO,HJ,BR,BRI)Series thrust needle roller bearing