Need a book? Engineering books recommendations...

Return to index: [Subject] [Thread] [Date] [Author]

Re: A325 bolts - nuts not fully engaging threads

[Subject Prev][Subject Next][Thread Prev][Thread Next]

On Apr 27, 2006, at 5:21 PM, Tom.Hunt(--nospam--at) wrote:

I may be wrong, but I think the 2 thread beyond the bolt comes from an ASME specification such as for bolted pipe flanges.
It's not mentioned in ASME BPV Section VIII or any references I have, like Machinery's Handbook. It's always been my understanding is that the extension is meant to exclude the imperfect threads at the end of the bolt from the load bearing portion. A couple of threads extending past the top of the nut is also a pretty good visual indication that the bolt has been tightened down. Except where someone bought bolts which were too long, of course.

It may just be that when people specify bolt lengths, they make them a little longer than absolutely necessary, rather than too short.

Christopher Wright P.E. |"They couldn't hit an elephant at
chrisw(--nospam--at)   | this distance" (last words of Gen.
.......................................| John Sedgwick, Spotsylvania 1864)

******* ****** ******* ******** ******* ******* ******* ***
*   Read list FAQ at:
* * This email was sent to you via Structural Engineers * Association of Southern California (SEAOSC) server. To * subscribe (no fee) or UnSubscribe, please go to:
* Questions to seaint-ad(--nospam--at) Remember, any email you * send to the list is public domain and may be re-posted * without your permission. Make sure you visit our web * site at: ******* ****** ****** ****** ******* ****** ****** ********