Fastener having an axially and radially undulating flange

Details Fastener having an axially and radially undulating flange Fastener having an axially and radially undulating flange

F - Mech Eng,Light,Heat,Weapons

16

B

85/110

F16B 31/02 (2006.01) F16B 39/282 (2006.01)

Patent

CA 1241854

FASTENER HAVING AN AXIALLY AND RADIALLY UNDULATING FLANGE ABSTRACT Disclosed is a screw comprising a threaded shank, a head at one end of the shank adapted to accommodate a driving tool, the head including an integral flange with radial and axial undulations on the flange. The undulations create non-abrupt variations in radial and axial profiles of the flange, the variations in axial profiles of the flange defining a recess in the head. The radial and axial undulations occur with the radial outward peaks and the axial downward peaks at coincident locations on the flange. The undulations are adapted to interfere with a workpiece upon threaded advancement of the screw into the workpiece, whereby torque required to strip the screw is increased.

454492

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