Joe,



You are correct . . . start from the center & work out.  For examples, look at any old Chilton or Haynes auto repair manual for tightening sequences of cylinder heads or the tightening of wheel lug nuts.  This should be done in at least three steps - first install h/w loose for proper assembly alignment, second snug h/w to seat assembly, third tighten h/w to spec.  



This will not have any bearing on the loose nut behind the steering wheel though, especially if the nut is torqued.



Loa



-----Original Message-----

From: TechNet [mailto:[log in to unmask]] On Behalf Of Joe Macko

Sent: Wednesday, September 16, 2009 10:02 AM

To: [log in to unmask]

Subject: [TN] recommended screw tightening sequence for various patterns



Hi All.



 



I got involved in a discussion on best practices when it comes to

recommended screw pattern tightening sequences (i.e., what is the best

order to tighten threaded fasteners) for electronic box assembly and am

looking for some examples and supporting data for recommended tightening

sequences for threaded fasteners in various patterns from rectangular to

square to circular.  Most of my training has taught me to start in the

middle and work outwards.  I would like to hear what other users do.



 



Thanks for the help.



 



Best Regards,



-Joe M.



 





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