Drive Tensioner, Arm Length to Hole Center Not Applicable, Includes Tightener Shaft No, Mount Base Length 7 1/2 in, Mount Base Width 3 1/2 in, Mount Hole Diameter 5/8 in, Overall Length 7.5 in, Shaft Diameter 1.5 in, Shaft Length Not Applicable, Shaft Thread Size 1 In.-14, Thread Length 1 5/16 in, Adjustment Type Non-Adjustable, Compatible Tightener Shaft Manufacturer Part Number SO5, SO6, Mount Hole Center-to-Center Length 6 in, Number of Mount Holes 2