Motiv RC MC2 aluminium can screws
Motiv RC have introduced a set of aluminium can screws for the MC2 series of brushless motors. On top of weight savings, these screws will eliminate a portion of the eddy current brake or non working magnetic field on the motor. The screws are of 2.5mm thread and are 42mm in length. The three combine for only 1.5g in total weight which is less than half of their steel counterparts.
Source: Motiv RC [motivrc.com]