Century Dictionary and Cyclopedia
- n. A screw, as in a cramp, screwed through one part tightly upon another, to bring pieces of wood, metal, etc., into close contact.
- n. A screw used to fix a pulley, collar, or other detachable part to a shaft, or to some other part of a machine, by screwing through the detachable part and bearing against the part to which it is to be fastened. Such screws have usually pointed or cup-shaped ends, which bite into the metal.
- n. Specifically, a screw having a square head, the distance across the flats of the head being equal to the diameter of the screw.
- n. A screw with threads the entire length and no head. Typically, setscrews have a hex or slot drive recessed in the threaded length.
- n. Any screw used to hold or adjust a setting. Frequently a setscrew (1), but may also refer to any other machine screw or thumb screw used for the purpose of setting.
GNU Webster's 1913
- adj. (Mach.) a screw, sometimes cupped or printed at one end, and screwed through one part, as of a machine, tightly upon another part, to prevent the one from slipping upon the other.
- n. a screw (often without a head) that fits into the boss or hub of a wheel or cam etc. and prevents motion of the part relative to the shaft on which it is mounted
- n. a screw that is used to adjust the tension on a spring
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