From: "Jim Miller" 
To: "Scott Berfield" ,
        
Reply-To: "Jim Miller" 


here's a captive nut that worked for me.

http://www.mcmaster.com/param/asp/psearch.asp?FAM=panelnuts&FT_158=8473&sess
ion=panelnuts;158=8473

----- Original Message -----
From: "Scott Berfield" 
To: 
Sent: Monday, March 17, 2003 9:15 AM Subject: RE: ATM Braze or Epoxy to Aluminum?



How strong to you need this to be? There are a couple of approaches I would
look at. Brazing is possible, but if the plate is thin, you need to be very
careful with your torch - and brazing two dissimilar metals (since your nut
is probably zinc coated steel or some-such) is not likely to produce a
strong joint. It is obviously strongest if you could put the nut on the
opposite side of the plate so that tightening the bolt pulls the plate
rather than stressing the joint. You could also carefully drill the hole in
the plate, adhere the nut using epoxy, then use a tap to thread down
through the nut (being careful to engage the existing threads and not
crosscut) and the plate so you have a continuous thread through the nut and
plate. Then use a bolt that reaches through both. You could also mount a
tee-nut (use epoxy again)) such that the wide base of it is on the opposite
side of the plate (only adds 1/16" of height) and the threaded portion
sticks through. Then thread into that.

-sb

-----Original Message-----
From: Orion105 [mailto:orion105{at}gmx.co.uk]
Sent: Monday, March 17, 2003 8:00 AM To: atm{at}shore.net


Hi

I need to fix a nut to some thin Al plate so that I can thread on a bolt. 
The plate is too thin to take a good thread.  How should I do this?  I have
a basic brazing torch, and can get Al braze rod and flux.


Or is it just as secure to epoxy the nut on.

If the recommendation is to braze, having heated Al before, I have noticed
that it gets quite soft when cool.  How do you maintain the slight
"spingyness" of the original material?

Thanks in advance..

Ado

--- BBBS/NT v4.00 MP