Spektrum RC Set Screw Prop Adapter. This prop adapter fits motors with an 8mm shaft size and uses a set screw to lock it in place. The propeller mounting is accomplished by a 5/16"x24 threaded shaft. Package includes one prop adapter, one prop adapter washer, one prop adapter nut, and a mounting set screw.

Specifications:

• Prop Shaft Diameter: 5/16"
• Prop Shaft Length: 24mm
• Collet Diameter: 5mm