20 has an inner root diameter 26 as will be appreciated from an understanding of the present invention and as shown in fig1 the outer crest diameter 24 and inner root diameter 26 of the screw or rib formation 20 on the fastener shank 12 are sized relative to the complementary article or workpiece opening or aperture 30 through which the fastener 10 is configured to pass in the illustrated embodiment the convolutions 22 along the length of the fastener shank 12 are substantially identical relative to each other and equally extend away from axis 14 accordingly in a preferred embodiment the screw formation 20 and thus the fastener shank 12 has a substantially constant outer diameter along the length thereof the outer crest diameter 24 of the threaded formation 20 is sized slightly greater than the diameter of the article or workpiece hole or opening 30 through which fastener 10 passes moreover the inner root diameter 26 of the threaded or rib formation 20 is sized slightly less than the diameter of the article or workpiece hole or opening 30 through which the fastener 10 passes in the exemplary embodiment the free end of the fastener shank 12 opposite from the fastener head 16 has a pilot 32 configured to facilitate introduction of the fastener shank 12 into the.