M5 Propeller Nut Cap, CW/CCW Pair, for EMAX 2204 Brushless Motors

Propeller retention hardware is one of those parts where a generic substitute often almost fits - close enough to thread on, not close enough to seat and lock reliably under the vibration and torque reversal a spinning prop puts through it. This nut cap pair is sized specifically for the EMAX 2204's shaft and thread spec, with the CW/CCW pairing matched to how that motor's rotation direction needs the nut to self-tighten rather than work loose in flight.