If you are working on US manufactured equipment, this reference from AC 43.13-1B is applicable, unless there is a particular installation requirement in the maintenance manual or in standard practices.. .. .Chapter 7. Section 3. Para 3-36.. . </font><blockquote><font size="1" face="Verdana, Arial, Helvetica">quote:</font><hr /><font size="2" face="Verdana, Arial, Helvetica"> All bolt installations which involve self-locking or plain nuts should have at least one thread of the bolt protruding through the nut.</font><hr /></blockquote><font size="2" face="Verdana, Arial, Helvetica"><a href="http://av-info.faa.gov/dst/43-13/Ch_07-03.doc" target="_blank">FAA Advisory Circular AC 43-13-1B</a>. . . . <small>[ 13 March 2002, 02:04: Message edited by: Cyclic Hotline ]</small>