Patent ID: 6155761
Filing Date: 2000-12-05
Classification: B21H,F16B

Abstract:
A member for engagement with a female member having an internally threaded bore, said member comprising: a head having means for engagement by a tool; a shank portion extending from said head, said shank portion having a plurality of threads of a consistent predetermined major diameter; and a point adapted to be engaged with the threaded bore in the female member to promote alignment of the member with the threaded bore prior to the start of engagement of the shank portion with the internally threaded bore, said point comprising an unthreaded radiused portion and a transition portion between said shank portion and said radiused portion, said transition portion having a plurality of truncated threads thereon, the truncation of said threads resulting in major surfaces of said threads in said transition portion providing a substantially spherical profile, said threads on said transition portion being continuous with the adjacent threads on said shank portion, said threads on said shank portion continuously extending from proximate to said head to said transition portion.