This is the Great Planes ElectriFly Collet Cone Adapter 4mm-1/4-28.

Features

Aluminum construction, Silver in color
Mounts on electric motors with a 4mm shaft and adapts them to a
1/4-28 diameter prop shaft
Cone shaped spinner nut adds good looks

Includes

One 4mm Prop Shaft
One Aluminum Knurled Prop Hub
One Aluminum Prop Washer
One Aluminum Spinner Nut (1/4-28 threaded)

Requires

Installation

Specifications

Length: 1.61" (41mm) as assembled
Length: 1.31" (33.3mm) shaft only
Length: .94" (24mm) spinner nut only
Shaft Diameter: 1/4-28
Spinner Nut Diameter: .59" (15mm) at the widest point

Comments

For the version without a spinner nut order GPMQ4965.