Posted for "Cy Galley" <cgalley@qcbc.org>:

Fine pitch threads are actually stronger than coarse pitch when the threaded material is dense.  On weaker, less dense material such as cast aluminum, the course threads are the best solution but they are not as strong as fine threads in a steel to steel lash up. Fine threads leave the female part at its strongest.

Cy Galley, TC - Chair, Emergency Aircraft Repair, Oshkosh

Editor, EAA Safety Programs
cgalley@qcbc.org or experimenter@eaa.org

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