Patent ID: 6406238
Filing Date: 2002-06-18
Classification: H01R

Abstract:
An earth nut in combination with a threaded member with which said earth nut is threadably engaged so as to secure a part having a seat surface to a mating member, where the seat surface and the threaded member having a coating film thereon and where the earth nut includes a bottom surface, said earth nut comprisinga flanged nut, the flanged nut having a nut body and a flange formed at a lower end of the nut body so as to be integral with the nut body; wherein a plurality of projections are formed at a lower portion of the flange near an outer peripheral edge of the flange, each of said plurality of projections being configured and arranged to cut and peel off the coating film on the seat surface as the flanged nut is threadably secured to the threaded member, whereby the bottom surface contacts the seat surface; wherein the nut body includes a female thread portion therein and a plurality of longitudinal grooves provided on screw threads of the female thread portion that extend axially within the nut body; and wherein on one sides of the lines of intersection of the screw threads of the female thread portion of the nut and the longitudinal grooves, edges are formed that are to peel off the coating film adhered to screw threads of the threaded member.