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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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#1
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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. |
#2
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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. |
#3
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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 -- |
#4
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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
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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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