machine' screw"

a threaded fastener, either used with a nut or driven into a tapped hole, usually having a diameter of about ¼ in. (6.4 mm) or less and a slotted head for tightening by a screwdriver. Cf. cap screw, machine bolt.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

machinery steelmachine shop
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