Wrench - Size Designations

Size Designations

Size is usually determined by dimensions such as across-flats distance (inscribed-hexagon size). In the 19th and early 20th centuries, it was common to define the nominal size of the wrench according to the nominal size of the screw thread that it was meant to be used on. This is seldom if ever done anymore. (The accompanying photo explains visually.)

Read more about this topic:  Wrench

Famous quotes containing the word size:

    “Learn to shrink yourself to the size of the company you are in. Take their tone, whatever it may be, and excell in it if you can; but never pretend to give the tone. A free conversation will no more bear a dictator than a free government will.”
    —Philip Dormer Stanhope, 4th Earl Chesterfield (1694–1773)