An indication device particularly for wheel nuts, focused on the control of the entrance and exit of moisture in service of a vehicle

摘要

A safety device for indicating relative rotational displacement between a fixed first member-and a second member which is rotatable engaged with the first member in axial direction to secure a wheel to a vehicle, comprises a body 7 with a pointer 1 for indicational means, containing on one side in axial direction a bore, at least formed with equispaced grooves enabling the device to be releasable secured to the second member. In an area towards the end of the bore there is provided at least one small opening 3 located at the periphery of the bore, allowing to swing moisture out by the centrifugal forces as the wheel is rotation.