Fastener

An improved fastener, comprising:

• first and second disk-shaped components assembled so as to be rotatable with respect to each other about a common axis, said first component having a pressure transmitting portion and a resilient flexing portion, said pressure transmitting portion being adapted to bear against an object to be fastened and being radially spaced from said common axis, said second component having a threaded portion adapted to apply an axially directed compressive force to said second component to press the pressure transmitting portion of said first component against said object when a torque is applied to thread said second component and wherein said flexing portion is adapted to allow the first component to flex when the pressure transmitting portion is pressed against said object so as to apply a clamping pressure to said object, said second component being provided with a recessed annulus within which said first component is rotatably received and wherein said recessed annulus is adapted to accommodate the flexing of the first component;
• a solid dry lubricant material having a low coefficient of friction provided between said first and second components to reduce friction therebetween when one of the components is rotated relative to the other whereby, in use, said solid dry lubricant material can ensure that a significantly increased proportion of the torque applied to said second component to fasten said object can be converted to said compressive force transmitted to the object through said pressure transmitting portion;
• and
• a containment means provided in connection with said first and second components for containing said solid dry lubricant material therein whereby, in use, said solid dry lubricant material is capable of withstanding substantial compressive loads without being forced from between the first and second components.