Power Lock(R) AS Series Shaft Dia 1.500 In -0.0015 In Shaft Dia Tolerance Outside Dia 2.559 In +0.0015 In Outside Dia Tolerance Overall Length 0.787 In Hub Contact Pressure 15500 PSI Locking Bolt Quantity 11 M6 X 18 Bolt Size Withstand Temp -22 - 400 Deg F Carbon Steel Material