Head Cap Screw

Some articles on screw:

Hex Key - History
... Extant records suggest (without offering exhaustive documentation) that the idea of a hex socket screw drive was probably conceived as early as the 1860s through ... Allen patented a method of cold-forming screw heads around a hexagonal die (U.S ... Published advertisements for the "Allen safety set screw" by the Allen Manufacturing Company of Hartford, Connecticut, exist from 1910 ...

Famous quotes containing the words screw, head and/or cap:

    “Cham” is the only thing to screw one up when one is down a peg.
    Anthony Trollope (1815–1882)

    When you got to the table you couldn’t go right to eating, but you had to wait for the widow to tuck down her head and grumble a little over the victuals, though there warn’t really anything the matter with them. That is, nothing only everything was cooked by itself. In a barrel of odds and ends it is different; things get mixed up, and the juice kind of swaps around, and the things go better.
    Mark Twain [Samuel Langhorne Clemens] (1835–1910)

    ... everyone developing
    A language of his own to write his book in,
    And one to cap the climax by combining
    All language in a one-man tongue-confusion.
    Robert Frost (1874–1963)