Du-Bro 542 2-Inch Black Three-Blade Spinner with 4 Shaft Adapters

The Du-Bro 542 is a 2-inch black three-blade spinner built for RC aircraft. It comes with four shaft adapters—6mm, 1/4", 7mm, and 5/16"—so you can fit it on common motor shafts without extra parts. A nylon insert lock nut design keeps the spinner securely attached to the back plate, reducing the chance of loosening during flight. This spinner is intended for hobbyists aged 10 and older who are assembling or upgrading remote-controlled planes.

What shaft adapters are included?

The spinner package contains four aluminum adapters that let you match the spinner to your motor shaft. The sizes provided are:

• 6 mm
• 1/4" (6.35 mm)
• 7 mm
• 5/16" (7.94 mm)

These cover the most common shaft diameters used in RC airplane motors. If your shaft is one of these, you can install the spinner right out of the box without buying additional hardware.

How the spinner secures to the back plate

Unlike many spinners that rely on a simple screw or friction fit, the Du-Bro 542 uses a nylon insert lock nut. The nut threads onto the back plate and the spinner cone, and the nylon insert creates a tight grip that resists vibration. This design helps keep the spinner from working loose during engine run-up or flight. The entire assembly is simple to install—no special tools are needed beyond a standard wrench or nut driver.

Product dimensions and weight

Common questions about the Du-Bro three-blade spinner

Does the spinner work with electric motors?

The supplied data does not specify motor type compatibility. The spinner includes shaft adapters for common sizes, so it may fit electric motors that use those shaft diameters, but we recommend checking clearance and balance for your specific setup.

Can children use this product?

The manufacturer recommends the spinner for ages 10 years and up. It is a hobbyist part meant for assembly on remote-controlled vehicles, so adult supervision is advised for younger users.

Does the spinner come with a back plate?

Yes, the spinner includes a back plate and all necessary hardware to attach the cone. The nylon insert lock nut is part of the attachment system.

How do I clean or maintain the spinner?

The product information does not include care instructions. As a general practice for plastic RC parts, wipe with a soft cloth and avoid harsh solvents that could damage the finish.

With its included adapters and secure lock-nut design, the Du-Bro 542 three-blade spinner offers a straightforward way to upgrade the look and performance of your RC aircraft. The black finish and three-blade configuration provide a distinctive appearance on the nose of your plane.