Propeller, 12 in Propeller Dia. (In.), 928/629 CFM @ 0.000-In. SP, Aluminum Blade Material/ DIAMETER: 12.000 INCHES NOMINAL BORE DIAMETER: 0.375 INCHES NOMINAL MOUNTING BOLT CIRCLE DIAMETER: 2.750 INCHES NOMINAL BLADE QUANTITY: 3 HUB LENGTH: 0.625 INCHES NOMINAL ATTACHMENT METHOD: SETSCREW HUB LOCATION: BACK HUB STYLE: SINGLE INSIDE OFFSET HUB MATERIAL: ALUMINUM STYLE DESIGNATOR: ROUNDED TIP