A fastener comprising: a nut that defines an internally threaded cylindrical bore through said nut along a longitudinal axis, wherein said nut comprises a nut head on a first end, a cylindrical outer surface , an external tapered ramp surface on a second end , an unthreaded cylindrical recess extending from said second end toward said first end, and a first shoulder in said cylindrical bore positioned between the internal threads thereof and said unthreaded cylindrical recess ; a bolt (140;240) comprising a bolt head , an externally threaded portion (144;244) threadingly engaged with said internally threaded cylindrical bore of the nut, an enlarged shank (150;250;450) positioned between said externally threaded portion and said bolt head, and a second shoulder (152;252) on said enlarged shank, wherein an outer diameter of the enlarged shank (150;250) is smaller than an internal diameter of the unthreaded cylindrical recess of the nut , and wherein the outer diameter of the enlarged shank is larger than a major diameter of the internally threaded cylindrical bore of the nut and/or or larger than a major diameter of the externally threaded portion (144;244) of the bolt; and a sleeve defining an unthreaded cylindrical bore , wherein said sleeve is positioned over said bolt between said bolt head and said external tapered ramp surface of the nut, and adapted to form a blind side upset when said bolt is tightened relative to said nut, and wherein said first shoulder and second shoulder (152;252) are adapted to abut and block further movement of said bolt relative to said nut in a tightening direction when the blind side upset is fully formed. a nut that defines an internally threaded cylindrical bore through said nut along a longitudinal axis, wherein said nut comprises a nut head on a first end, a cylindrical outer surface , an external tapered ramp surface on a second end , an unthreaded cylindrical recess extending from said second end toward said first end, and a first shoulder in said cylindrical bore positioned between the internal threads thereof and said unthreaded cylindrical recess ; a bolt (140;240) comprising a bolt head , an externally threaded portion (144;244) threadingly engaged with said internally threaded cylindrical bore of the nut, an enlarged shank (150;250;450) positioned between said externally threaded portion and said bolt head, and a second shoulder (152;252) on said enlarged shank, wherein an outer diameter of the enlarged shank (150;250) is smaller than an internal diameter of the unthreaded cylindrical recess of the nut , and wherein the outer diameter of the enlarged shank is larger than a major diameter of the internally threaded cylindrical bore of the nut and/or or larger than a major diameter of the externally threaded portion (144;244) of the bolt; and a sleeve defining an unthreaded cylindrical bore , wherein said sleeve is positioned over said bolt between said bolt head and said external tapered ramp surface of the nut, and adapted to form a blind side upset when said bolt is tightened relative to said nut, and wherein said first shoulder and second shoulder (152;252) are adapted to abut and block further movement of said bolt relative to said nut in a tightening direction when the blind side upset is fully formed. <EOS>