6650-01-466-9503

A cylindrical item which may have wrenching and/or driving facilities and/or shoulders. It is designed to be inserted in a drilled, tapped or a pretapped hole, or molded or pressed into soft material to reduce the size of a tapped hole; to provide threads; to add strength, and/or to prevent stripping. It is one of the following: (1) a one-piece, flanged or unflanged, internally threaded item which may have external threads, and/or serrations around the periphery of the collar, designed to engage a serrated lock ring which is not included with the item; (2) a one-piece precision coiled wire; (3) a two-piece item consisting of an internally threaded cylinder and a mating externally threaded part; or (4) a one-piece internally threaded item whose outside diameter is tapered and/or knurled and/or with fin(s). The internal thread of the item may have a locking feature. Excludes:items having a sleeve on on its under portion which can be clinched or crimped. Excludes:bushing,machine thread; nut,plain,knurled; nut,plain,round; nut,plain,clinch and nut,self-locking,clinch. See also nut,plain,plate

"field; inverted compound design; lightweight; standard 160 mm tube length; 4x, 10x, and 40x objectives; intended for phase contrast work; eyepiece is 10x widefield 15.5mm,with case; with "mini maglite" light source; protected with acid and reagent resistant swift epoxy-ester resin; threaded to accept standard tripods; has a phase annulus and case" special features, microscope optical field inverted compound design 160mm tu lg part name assigned by controlling agency