"Baz" wrote in message
...

"Rick Hughes" wrote in message
news
I have an expensive item that is manufactured from Billet Aluminum.
It is assembled with 316 stainless steel csk hex head screws.

I need to disassemble and the screws are stuck fast.

Snip

The screws could be fitted with thread locking compound.
Suggest you use a Hot Air Gun.

From tds.loctite.com/tds5/docs/220-EN.PDF

For Disassembly

1. Remove with standard hand tools.

2. In rare instances where hand tools do not work because

of excessive engagement length, apply localized heat to

nut or bolt to approximately 250 °C. Disassemble while

No Thread lock used ... but guess dissimilar metals has caused the issue.