I need help with fastener selection..........?

Question

I need a self clinching M4 nut/stand-off for a 3mm aluminum sheet....but due to sealing constraints, i cannot drill a through hole.

Is it possible to pressure-fit the nut using only a blind hole.

I am aware of Blind stand-offs, but they are not available locally (and are very expensive to import)

please suggest easier alternatives........(also should satisfy flushing.)

Answer 1

Maybe i'm not understanding the specific question or application, but if you're dealing with aluminum sheet metal and you need a good seal, what I've used most often is pop rivets and either permatex, TXV, or, in a bind, electrical tape for a joint in the aluminum.  If you need a stud for mounting something on aluminum that thin, you're probably going to need to attach either by weld or rivet a backing plate.  I'm not overly ffamiliarwith civilian lingo, so if I in now way helped sorry about that.