Lock Nut Hydraulic Ram Single Acting Lock Nut Steel Nominal Capacity 50 ton Stroke Length 3 7/8 in Nominal Stroke Length 4 in Effective Push Area 12.17 sq in Max Pressure 10 150 psi Oil Capacity Push 47.93 cu in Retracted Height 8.43 in Extended Height 12.36 in Outside Dia 5.11 in Plunger Dia 3.94 in Plunger Thread Size 1/4 in Collar Thread Size 1-3/8 In.-12 Base Bolt Circle Dia 4.13 in Center Hole Dia 3 57/64 in Series HCL