Riser Clamp Bolt Diameter 25/64 in Bolt Length 25/64 in Clamp Material Steel Clamp Material Finish Electrogalvanized For Maximum Outside Diameter 3 1/2 in For Pipe Size 3 in Load Capacity 530 lb Mounting Hole Diameter 0.39 in Overall Height 1 in Overall Length 11.75 in Overall Width 1 in For Use On Pipe Standards MSS SP-58 Type 8 WW-H-171 Type 8 Bolt Center-to-Center Length 8 1/8 in