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.)

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Famous quotes containing the word size:

    “Delusions that shrink to the size of a woman’s glove,
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