This is a package of DUBRO wheel collars generally used to secure the wheels
on the axles on an airplane but can be used for other applications as well.

Features

Plated brass
Uses a set screw to lock collar to the axle

Includes

Twelve wheel collars
Twelve 4-40 set screws
One .050" allen wrench

Specifications

inside diameter - 1/8"
outside diameter - 9/32"
thickness - 3/16"