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Bolt Thread Engagement

Bolt Thread Engagement

Bolt Thread Engagement

(OP)
What is the formula for bolt thread engagement?

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I need to know if I have sufficent thread engagement when fastening together a .190" thick aluminum sheet to 16GA steel power strip chassis?

My Current Analysis is ...

screw length: .45"
material thickness: .190"
.45" - .190" = .260 thread engagement

I currently am going with a good rule of thumb, which is 1.5 * maj. dia. of screw (.185") = .2775 (.2775 - .260 = .0175 more thread engagement needed)


RE: Bolt Thread Engagement

This was covered in a previous thread:

Thread725-35222

If your internal threads are steel, a good rule of thumb is ~ 1.0 * bolt nominal diameter.  You may have adequate engagement.

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