In Reply to: welding or press nuts posted by Bart Sioen on 03/01/00 at 1:43 AM:
Press nuts, as in PEM fasteners, are typically limited to a given torque and pull-out rating, depending on the nut size. Obviously, welded nuts have their limits too, but should withstand greater forces. Based on my experience and applications, press-in nuts are cheaper due to ease of installation and not having to setup for welding.
Depending on your application, I would go with press nuts. I use a lot of them in products I design and they are very handy. Any time I try to use welding in any application, it always turns out to increase the cost of a part drastically.
The only way I can see where welding would be more cost effective is if your quantities are high enough to justify automated welding.
Just my opinion.