Spektrum Set Screw Prop Adapter – 5.0mm Motor Shaft to 5/16x24 Thread [SPMXAMA4939]

The Spektrum Set Screw Prop Adapter (part number SPMXAMA4939) allows you to mount 5/16x24 threaded propellers to a motor with a 5.0mm shaft, making it ideal for larger electric aircraft setups. This precision-machined aluminum adapter ensures proper fit, reduced vibration, and secure prop retention thanks to its dual set screw locking system.

Perfect for pilots who need a reliable, high-strength connection between their motor and propeller in sport or aerobatic applications.

Key Features:

• Part Number: SPMXAMA4939

• Motor Shaft Size: 5.0mm

• Propeller Thread: 5/16x24 (fine thread)

• Material: Lightweight, durable aluminum

• Locking Mechanism: Dual set screws for secure hold on shaft

• Use Case: Adapts electric motor shaft for use with threaded prop hubs

• Ideal for: Larger electric RC aircraft requiring strong, balanced prop installation

• Includes:

  • (1) Prop adapter

  • (2) Set screws (pre-installed or included)

Ensure a smooth, solid prop connection with the Spektrum 5.0mm to 5/16x24 Set Screw Prop Adapter—built for performance, precision, and peace of mind.