51 Pump Tandem Unit – Standard Studs Cw With OB Bearing Sae 4 Bolt C 125” – 14 Splines First Stage 1-3/4” Gear Blank Inlet Orb#16 Outlet Bc 24 Npt With Common Suction #12 Orb Outlet For First Section Second Stage 1/2 Gear Blank Inlet And Outlet Unported Pec