Product Specifications: Material: Cast Iron Displacement: 231 CM3/R [14.10 in³/r] Pressure Rating (max): 1450 PSI Speed: 243 RPM Output Torque: 2669 inch-pound Flow Rate (max): 15 GPM Port Size: 1/2 inch NPTF Keyed Shaft Size: 1 inch diameter x 1/4 inch straight. Mounting Type: 4 Bolt Std - 44.40 [1.748] Dia. X 3.05 [.120] Pilot, .375-16 Unc-2b Mounting Port Type: .500-14 Nptf Dryseal Pipe Thread Ports Output Shaft: 25.4 [1.00] Dia. Straight, Woodruff Key, .250-20 UNC-2B Hole in Shaft End Output Shaft Size: 1 in Straight - Woodruff Key Case drain: No Case Drain Holes On 82.55 [3.250] Dia. B.C.