Spektrum Collet Cone Prop Adapter – 5mm Motor Shaft to 5/16x24 Thread [SPMXAMA4994]

The Spektrum Collet Cone Prop Adapter (part number SPMXAMA4994) provides a precision-fit solution for mounting 5/16x24 threaded propellers to a 5mm motor shaft. Using a collet-style locking mechanism, this adapter grips the shaft evenly without set screws, resulting in improved balance, reduced vibration, and easier installation—perfect for electric aircraft where smooth, secure prop engagement is critical.

Machined from lightweight aluminum, this adapter offers reliable strength without adding unnecessary weight to your power system.

Key Features:

• Part Number: SPMXAMA4994

• Motor Shaft Size: 5mm

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

• Design: Collet cone-style grip for even clamping force

• Material: Precision-machined aluminum

• Use Case: Converts smooth 5mm motor shafts to threaded prop compatibility

• Ideal for: Electric sport and scale aircraft requiring secure, balanced prop mounting

• Includes:

  • (1) Collet adapter with cone

  • Threaded prop shaft section

  • Backplate nut (if applicable)

Upgrade your prop connection with the Spektrum 5mm to 5/16x24 Collet Cone Adapter—engineered for strength, simplicity, and performance.