If you have a 1/4 - 20 UNC threaded screw and rotate it ten full turns, the end will travel 1/2".

Name: If you have a 1/4 - 20 UNC threaded screw and rotate it ten full turns, the end will travel 1/2".
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Question

Quizplus · Accepted Answer

A 1/4 - 20 UNC threaded screw has 20 threads per inch, so each full turn advances the screw 1/20th of an inch. Therefore, ten full turns would advance it 10/20ths of an inch, or 1/2 inch.

If You Have a 1/4 - 20 UNC Threaded Screw