Power Lock(R) AS Series Shaft Dia 2.1875 In -0.0018 In Shaft Dia Tolerance Outside Dia 3.543 In +0.0018 In Outside Dia Tolerance Overall Length 0.945 In Hub Contact Pressure 17780 PSI Locking Bolt Quantity 11 M8 X 22 Bolt Size Withstand Temp -22 - 400 Deg F Carbon Steel Material