| 摘要 |
Movable jaw measuring apparatus usable for measuring widths across the flats of bolts includes a fixed jaw and a movable jaw, and reference marks for indicating the measurements may be in both inch and metric units. The movable jaws can also be used to measure the diameter of the bolts. Apparatus includes linear measurement indicia for measuring the length of various elements, also in both inch and metric units, if desired. Peripheral surfaces may include serrations for measuring the pitch of threads, or thread measuring indicia may be printed on surfaces.
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