Riser Clamp, Bolt Diameter 1/2 in, Bolt Length 7/16 in, Clamp Material Steel, Clamp Material Finish Not Applicable, For Pipe Size 2 1/2 in, Load Capacity 400 lb, Mounting Hole Diameter 0.438 in, Overall Length 11.25 in, Overall Width 1 in, For Use On Conduit, Pipe, Maximum Operating Temperature 450 Degrees F, Standards ANSI/MSS SP-69, cUL Listed, A-A-1192A, Type 8, MSS SP-58, Type 8, UL Listed, WW-H-171-E, Type 8, Bolt Center-to-Center Length 4 3/4 in, Cushion Material No Cushion, Cushioned No