To find the thread pitch of a bolt that is 2 inches long with 48 threads:
Divide 2 inches by 48 threads.
The result is a 0.04167 inch thread pitch.
To get the thread pitch in millimeters:
Multiply 2 inches by 25.4 millimeters per inch to get 50.8 mm.
Divide 50.8 mm by 48 threads to obtain a thread pitch of 1.0583 mm.
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