Improved anti-cross threading fastener

Details Improved anti-cross threading fastener Improved anti-cross threading fastener

F - Mech Eng,Light,Heat,Weapons

16

B

F16B 33/02 (2006.01) F16B 35/00 (2006.01) F16B 35/04 (2006.01) F16B 5/02 (2006.01)

Patent

CA 2265140

An anti-cross threading fastener including a shaft portion having a first leading end portion with a first end, a first threaded shaft portion having a first tapered threaded shaft portion narrowing toward the first end, and screw threads of the first tapered threaded shaft portion have a flank angle greater than a flank angel of the screw threads of a first non-tapered threaded shaft portion. The screw threads of the first tapered threaded shaft portion preferably have the same pitch as the screw threads of the first non-tapered threaded shaft portion. A cylindrical shaft portion having a diameter less than a major diameter of the first threaded shaft portion may be disposed between the first end of the shaft portion and the first threaded shaft portion. The first leading end portion may have a first tip portion with a partially substantially curved surface, or a driving tool engagement surface.

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