Standard Pack = 1 piece(s). Cylinder Capacity, (tons) = 20 ; Stroke, (in) = 6.06 ; Cylinder Effective Area, (in2) = 4.9 ; Pressure at Capacity, (psi) = 8,167 ; Oil Cap., (in3) = 29.7 ; Min. Height, A (in) = 12.05 ; Max. Height, B (in) = 18.11 ; O.D., D (in) = 3.92 ; Plunger I.D., C (in) = 1.063 ; Plunger O.D., E (in) = 2.15 ; Plunger Internal Thread, J (in) = 1-9/16"-16UN ; Internal Thread Length, K (in) = .75 ; Collar Thread Dia., H (in) = 3-7/8 -12 ; Collar Thread Lgth., L (in) = 1.5 ; Base to Inlet Port, G (in) = .75 ; Base Mounting Hole Bolt Circle, X (in) = 3.25 ; Base Mounting Hole Thread, Y (in) = 3/8"-16UNC ; Base Mounting Hole Thread Depth, Z (in) = .37 ;