BR1 (DU) self-lubricating rolled bushing
BR2 (DX) boundary self-lubricating bushing
BR3 bimetal bushing
BR4 bronze rolled bushing
BR5 (500 #) solid lubrication bearing
BR6 engineering plastic bearing
BR7 steel back lubricated decentralized bearing
BR8 steel cast copper self-lubricating bearing
BR9 spring steel bushing