Patent ID: 7076989

Claim:
A thread rolling die for forming a threaded fastener, comprising: a body portion having a longitudinal axis; a working face disposed upon said body portion; a plurality of first, primary thread rolling die threads, disposed upon said working face of said body portion and oriented at a predetermined angle with respect to said longitudinal axis of said body portion, for forming a first, primary thread lead, comprising a plurality of first, primary threads, upon a blank member, wherein said plurality of first, primary thread rolling die threads are spaced from each other by means of first predetermined transversely spaced distances such that the first, primary threads are successively formed upon the blank member at first predetermined positions which are spaced from each other by means of first predetermined axially spaced distances; and a plurality of sets of second, auxiliary thread rolling die threads, disposed upon said working face of said body portion at positions transversely interposed between said plurality of first, primary thread rolling die threads and oriented at a predetermined angle with respect to said longitudinal axis of said body portion, for forming a dual set of second, auxiliary thread leads, each comprising a plurality of second, auxiliary threads, upon the blank member, wherein said plurality of second, auxiliary thread rolling die threads, comprising each one of said plurality of sets of second, auxiliary thread rolling die threads, are spaced from each other by means of second predetermined transversely spaced distances such that, as a result of said disposition of said plurality of sets of second, auxiliary thread rolling die threads, for forming said dual set of second, auxiliary threads, between said plurality of first, primary thread rolling die threads, when the plurality of first, primary threads are successively formed upon the blank member at the first predetermined positions, the distances through which material portions of the blank member, utilized for forming the plurality of first, primary threads upon the blank member, need to be moved is effectively minimized thereby, in turn, minimizing the length dimension of said thread rolling die required to completely form the threaded fastener from the blank member.