Importance

Loading Importance Indicators...

Abstract

The present invention provides a novel fastener having a tamper indicating tool engaging drive head. The fastener has a shank including a threaded shank portion. The fastener also has a double-headed driving portion that is integrally formed with the shank. The double-headed portion includes an outer head for driving the fastener into a work piece or nut and an inner head for removing the fastener from an assembly. The inner head is joined to the outer head such that the inner head is positioned between the outer head and the shank. Extending portions extend from tool engaging surfaces of the inner head. In use, the fastener is driven into an assembly via a proper tool that engages with the outer head. The outer head shears off the fastener when the desired torque is achieved, leaving only the shank within the assembly and the inner head exposed. Due to the extending portions on the tool engaging surfaces of the inner head, the fastener cannot be moved unless the extending portions are first broken off or otherwise removed from the inner head, thereby allowing a tool to properly engage with the tool engaging surfaces of the inner head. Because the extending portions must be removed for the tool to engage the fastener within the assembly, it will be evident when the fastener has been tampered with, thereby indicating to the proper personnel that the fastener should be replaced with a new fastener.

Loading the Abstract Image...

First Claim