Anti-Seize compound for stainless steel screws
Anti-Seize compound for stainless steel screws
(OP)
I am working on a very old assembly that has a stainless steel fasteners. I will be working on the equipment and then will be putting in new stainless steel screws and nuts. The notes on the old assembly drawing specified "Apply anti-seize compound GA-9289, Type 2, to threads". I need to work on the assembly and use the same anti-seize, however I could not find exactly what is specified. The best I could come up with was that Loctite Copper C5-A was the same as 9289. However, it does not address the "TYPE 2" requirement. I am thinking that maybe the 9289 is a copper based compound and the "Type 2" is maybe a Nickel based compound. Does anyone know? Is it OK to use a copper based anti-seize on stainless steel #10-32 screws with nuts? The environment is controlled in doors 72 degrees F.





RE: Anti-Seize compound for stainless steel screws
RE: Anti-Seize compound for stainless steel screws
RE: Anti-Seize compound for stainless steel screws
RE: Anti-Seize compound for stainless steel screws
I hope I am not out of topic but, anyway here are my two cents. Please take a look to these sources:
“Mechanical Properties and Corrosion Behavior of Stainless Steels for Locks, Dams, and Hydroelectric Plant Applications”, by Ashok Kumar & Ali A. Odeh, US Army Corps of Engineers, 1989.
http://www.dtic.mil/dtic/tr/fulltext/u2/a219490.pd....
thread725-366641: Hydraulic gates: bolts and nuts
thread725-18693: Stainless steel fasteners.
El que no puede andar, se sienta.
RE: Anti-Seize compound for stainless steel screws
If you can't obtain the specific anti-seize compound noted, then for the conditions described I would use a spray-on moly-disulfide dry film on the screw threads. Much cleaner than a copper or nickel paste and will stay in place over a longer period of time.
RE: Anti-Seize compound for stainless steel screws
"(Based on that, there is no apparent need for an anti-seize compound.)"
I'd say, Depending on the SS alloys, and applied torque, aggressive and destructive galling can happen in a temperature controlled precision spindle assembly clean room.
RE: Anti-Seize compound for stainless steel screws
je suis charlie
RE: Anti-Seize compound for stainless steel screws
RE: Anti-Seize compound for stainless steel screws
MIL-PRF-907 ANTISEIZE THREAD COMPOUND, HIGH TEMPERATURE
A-A-59313 THREAD COMPOUND; ANTISEIZE, ZINC DUST-PETROLATUM
MIL-PRF-83483 ANTISEIZE THREAD COMPOUND, MOLYBDENUM DISULFIDE-PETROLATUM
Henkel-Loctite and Bostik make reliable antiseize compounds for use on various metals, including high nickel alloy bolt/nuts, which are spec-qualified [see their web sites for recommendations] .
Regards, Wil Taylor
o Trust - But Verify!
o We believe to be true what we prefer to be true.
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o Unfortunately, in science what You 'believe' is irrelevant. ["Orion"]
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RE: Anti-Seize compound for stainless steel screws
I don't recall ever seeing anti-seize compounds called out when installing 10-32 cres screws/nuts in aerospace applications. The nuts used (such as MS21043) typically came with some form of anti-seize coating such as silver plating or moly-disulfide DFL. The problem with using the type of anti-seize compounds described is that they are very messy.
Screws and nuts made from austenitic stainless such as 304 or 316 will readily gall/seize. But using a better quality stainless alloy like A286 for the fasteners will greatly reduce the potential for galling/seizing.
RE: Anti-Seize compound for stainless steel screws
My first suspicion is they did so as the result of problems, although perhaps as a carry over from other products or projects.
Yes, it is a shame to carry forward rituals "just because."
But ........... I'd undertake some carefully orchestrated tests before abandoning the rabbit's foot.
Are there also specs for the nut and bolt SS materials they used back then?
RE: Anti-Seize compound for stainless steel screws
Dispensing it from a syringe minimizes the mess.
Silver plating works once, maybe, if you are lucky.
Mike Halloran
Pembroke Pines, FL, USA