Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work.

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Posted to rec.crafts.metalworking
Charles Spitzer
 
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Default What screws to use for aluminum


"Ignoramus14135" wrote in message
.. .
I will need to fasten stuff to aluminum using 10-32 screws. That will
work in a dry environment (no dripping water) with sometimes high and
soemtimes low humidity (garage).

Can I use regular shiny galvanized screws for this or would I have
galvanic corrosion issues and deal with stuck screws, later?

i


yes, you will have problems no matter what the screws are made of, unless
they're the same grade as the aluminium. boat masts see this all the time.
there is a goop that you can put in around the screws to prevent this
problem. note: most boat builders use ss screws for this.


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Posted to rec.crafts.metalworking
JWho
 
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Default What screws to use for aluminum


"Ignoramus14135" wrote in message
...
On Mon, 21 Nov 2005 14:01:52 -0700, Charles Spitzer

wrote:

"Ignoramus14135" wrote in message
.. .
I will need to fasten stuff to aluminum using 10-32 screws. That will
work in a dry environment (no dripping water) with sometimes high and
soemtimes low humidity (garage).

Can I use regular shiny galvanized screws for this or would I have
galvanic corrosion issues and deal with stuck screws, later?

i


yes, you will have problems no matter what the screws are made of,

unless
they're the same grade as the aluminium. boat masts see this all the

time.
there is a goop that you can put in around the screws to prevent this
problem. note: most boat builders use ss screws for this.


Well, boat masts live in presence of sal****er, whereas that aluminum
item will spend its life inside a steel cabinet in a garage.

i


Try anti-seize. Any auto prats store should have it. It will help to keep
dissimilar metals from bonding.


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Proctologically Violated©®
 
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Default What screws to use for aluminum

Somebody makes aluminum nuts/bolts out there. I have the name/number
*somewhere*, and believe they sent me some samples. Also forgot how I found
them, but google oughtta do it.

Also, mebbe nylon would work. A good hardware store has these storage cases
of nylon hardware, and a company called MicroPlastics carries a full line,
can order samples. Very nice company. microplastics.com
----------------------------
Mr. P.V.'d
formerly Droll Troll
"Ignoramus14135" wrote in message
...
On Mon, 21 Nov 2005 21:40:13 GMT, JWho wrote:

"Ignoramus14135" wrote in message
...
On Mon, 21 Nov 2005 14:01:52 -0700, Charles Spitzer

wrote:

"Ignoramus14135" wrote in
message
.. .
I will need to fasten stuff to aluminum using 10-32 screws. That will
work in a dry environment (no dripping water) with sometimes high and
soemtimes low humidity (garage).

Can I use regular shiny galvanized screws for this or would I have
galvanic corrosion issues and deal with stuck screws, later?

i


yes, you will have problems no matter what the screws are made of,

unless
they're the same grade as the aluminium. boat masts see this all the

time.
there is a goop that you can put in around the screws to prevent this
problem. note: most boat builders use ss screws for this.

Well, boat masts live in presence of sal****er, whereas that aluminum
item will spend its life inside a steel cabinet in a garage.

i


Try anti-seize. Any auto prats store should have it. It will help to
keep
dissimilar metals from bonding.



Yep, good point, will do just that.

i
--



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Pete Keillor
 
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Default What screws to use for aluminum

On Mon, 21 Nov 2005 22:00:46 GMT, Ignoramus14135
wrote:

On Mon, 21 Nov 2005 21:40:13 GMT, JWho wrote:

snip

Try anti-seize. Any auto prats store should have it. It will help to keep
dissimilar metals from bonding.



Yep, good point, will do just that.

i

It may be overkill, but I usually start out with helicoil thread
inserts in aluminum, especially if it's something I'll need to
disassemble or periodically tighten.

Pete Keillor
  #5   Report Post  
Posted to rec.crafts.metalworking
Proctologically Violated©®
 
Posts: n/a
Default What screws to use for aluminum

That's a very good idea!
Or, epoxy/weld a nut to the other side, if poss.
----------------------------
Mr. P.V.'d
formerly Droll Troll
"Pete Keillor" wrote in message
...
On Mon, 21 Nov 2005 22:00:46 GMT, Ignoramus14135
wrote:

On Mon, 21 Nov 2005 21:40:13 GMT, JWho wrote:

snip

Try anti-seize. Any auto prats store should have it. It will help to
keep
dissimilar metals from bonding.



Yep, good point, will do just that.

i

It may be overkill, but I usually start out with helicoil thread
inserts in aluminum, especially if it's something I'll need to
disassemble or periodically tighten.

Pete Keillor



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