Patent ID: 7686553

Claim:
A 2-piece positioning and fastener system in which a first element positions an article relative to a baseplate, the article having an opening formed therein, and a second element attaches the article to the baseplate, said 2-piece system comprising a) a first positioning and locating member, said first member having a cylindrical body portion formed integrally with and extending from a retention head portion as a single piece, said retention head portion being positioned at a trailing end of said body portion and extending radially outwardly therefrom, said cylindrical body portion having a generally constant cylindrical diameter extending from said retention head portion throughout its length to allow said first member to be removed from the opening of the article from a side of the article which is engaged by said retention head, said first member having a precision-machined external surface on a leading end thereof which is adapted to be received in the opening formed in the article and an unthreaded internal axial throughbore extending entirely there through; b) a second fastening member for attaching the workpiece to the base plate, said fastening member having a head portion which is totally received within said internal axial throughbore of said first member, an externally threaded attachment portion which extends beyond said leading end of said first positioning and locating member; c) removable retention means engaging a trailing end of said head portion of said fastening member for securing said fastening member within said internal axial throughbore of said positioning and locating member against undesired removal therefrom; whereby a portion of said cylindrical body portion of said first positioning and locating member extends through the article to be precisely located and is received in a precision-machined internal opening of the base plate and said threaded attachment portion of said second fastening member is securely engaged in the base plate to retain the article in position relative thereto.