API oilfield mud pump swivel washpipe: 1. made or 35CrMo forging steel 2.OME is ... accepted 3.long life API oilfield mud pump swivel washpipe:Over a 1000,000 of interchangebale mud pump parts ... ,FD-FXX,FG-GXG.NATIONAL OILWELL:10-P-130,12-P-160,8-P-80,7-P-50,K-700,K-700A,K-500 ... -LP,WILSON600,PPWH.OMEGA:OPI 1000: API oilfield mud pump swivel washpipe