Abstract: A threaded member such as a bolt, nut, or pipe has a threaded portion on a body of the member. The threaded portion of the member includes a first threaded section, a second threaded section, and a third threaded section. The first and third threaded section have standard threads which comprise standard roots, flanks, and crests. The second section is between the first and third sections and has threads in which a portion of the threads are raised relative to the standard threads to define bumps. The raised sections or bumps comprise a raised root, a raised flank, and a raised crest. The raised root and raised crest define diameters different from the diameters of the standard root and standard crest, respectively. In a exteriorly threaded member, the raised root and crest have diameters greater than the diameter of the standard root and crest, respectively. In interiorly threaded member, the raised root and crest define diameters smaller than the diameters of the standard root and crest, respectively.

Abstract: A threaded fastener is having a raised area or bump on a thread flank. The flank can be positioned on the nut thread or on the bolt thread. The bump forces the mating threads at least on one flank to have near zero tolerances along the pitchline of the threads and thereby eliminating play. A threaded repair insert having at least one raised area on a threaded surface also is provided.

Abstract: A threaded fastener is having a raised area or bump on a thread flank. The flank can be positioned on the nut thread or on the bolt thread. The bump forces the mating threads at least on one flank to have near zero tolerances along the pitchline of the threads and thereby eliminating play.

Abstract: A drill having an elongated body including a fluted land and a shank. The fluted land includes a plurality of radial grooves of reduced material thickness formed therein to the depth of the flutes. The grooves define discrete segments of the drill. Each segment has a facet which has the relief of a drill tip so that when the exposed drill tip becomes dull, the segment can be broken off at the notch exposing a successive, sharp drill tip. The drill can have the cutting edges coated with an appropriate protective material such as TiN, titanium nitride, titanium carbide, titanium carbonitride or any other appropriate coating material to improve cutting and preserve the edge.