This a 7/8" x 5/16-24 A-Style Prop Nut from Tru-Turn.             
                                                                               
FEATURES: Superior quality Barstock Aluminum construction.                     
          Steel "Torque Bar" for tightening.                                   
                                                                               
INCLUDES: (1) Prop Nut                                                         
          (1) Tightening Tool                                                  
                                                                               
SPECS:    Base Diameter: 1"            Dome Diameter: 7/8"                     
          Thread Size:   5/16-24       Length:        1-3/8"                   
          Approx.Weight: 1.1oz                                                 
                                                                               
COMMENTS: Using an electric starter with this prop nut would require modeler to
            turn the starter rubber insert around to use the smaller hole or   
            purchasing a new rubber insert with a smaller hole.