Greetings from Karthick Ashwath!I wanted to know if a prop adapter(collet)  is required.If it is required could someone tell me whether this adapter:Alu E-Spinner Type Prop Adapter For 4mm Shaft Link:http://www.rcdhamaka.com/index.php?main_page=product_info&cPath=100_93&products_id=762 would fit this propeller:APC Style Propeller 7x5R (Right Hand Rotation - 2pc) Link:
http://www.hobbyking.com/hobbyking/store/uh_viewitem.asp?idproduct=22973

Thanks in advance,
Karthick Ashwath.

You need to get either prop adapter or prop saver to attach the prop to the motor shaft.You can use the prop as well as the adapter given in the link but make sure that your motor has a 4 mm shaft.