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Machine screws have a uniform diameter the entire length of the shaft as opposed to tapered screws which have a pointed tip. Machine screws are typically used with a threaded hole to secure two parts together. Machine screws are fully threaded for use with a nut or in a tapped hole.

5/16-18 x 2-1/4&quot; Machine Screw - Pan Head - Phillips - Steel - Zinc CR+3 - FT - PKG. 50

5-16-18-x-2-1-4-machine-screw-pan-head-phillips-steel-zinc-cr-3-pkg-50

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