Description Cast Iron Bearing Housing - 4-Bolt Flange - For bearing 20928 - Will accept USA and Import Inserts but only the import inserts will be greasable. This item is a suitable alternative for the following: 851-NF209, F-85G, FS209, FBH4209IMP, FBH4209-IMP, RCJ-85MM, RCJ85MM, FBH4209