PROP ADAPTER 4.0 MM TO 1/4X28

This is a Great Planes ElectriFly 4.0mm - 1/4-28 Prop Drive (adapter)      
                         with Set Screw and Prop Nut.                         
                                                                              
FEATURES: Mounts onto the shaft coming out of a gearbox or motor with the     
            included set screw. The propeller mounts onto this with the       
            included nut                                                      
          Aluminum prop drive                                                 
          Metal hardware                                                      
          One year quality guarantee.                                         
          Fits a 4mm motor shaft with a 1/4" prop shaft.                      
                                                                              
INCLUDES: One Prop Drive                                                      
          One 3.5x5mm Set Screw                                               
          One 7/16 Propeller Nut                                              
                                                                              
REQUIRES: Installation onto the motor or gearbox shaft.                       
                                                                              
SPECS:    Length:   1.5" (37mm) end to end                                    
                    .98" (25mm) complete shaft w/.69" (17.6mm) threaded       
                      portion.                                                
          Diameter: 1/46" (6.27mm) prop shaft                                 
                  .16" (4mm) ID for motor shaft                               
                  .78" (20mm) largest part of hub (thrust washer portion)     
                  .47" (12mm) smallest part of hub