Hollow Hydraulic Ram Single Acting Hollow Plunger Steel Nominal Capacity 6 ton Max Push Capacity 6 ton Stroke Length 1/4 in Nominal Stroke Length 5/16 in Effective Push Area 2.76 sq in Max Pressure 5 000 psi Oil Capacity Push 0.86 cu in Retracted Height 2.19 in Extended Height 2.5 in Outside Dia 2.75 in Plunger Dia 1.38 in Plunger Thread Size 3/4 In.-16 Collar Thread Size 2-3/4 In.-16 Base Bolt Circle Dia 2 in Base Mounting Thread Size 5/16-18 Center Hole Dia 0.77 in