On 23/03/14 21:12, Dave Rove wrote:
I want to fit Yale door bolts to an aluminium patio door.
( This bolt: http://www.amazon.co.uk/dp/B004J3416S )

The aluminium of the patio door frame is only 1.5mm thick, so I guess
that I'll have to insert "rivnuts" into the frame. Or something.
( This sorta thing: http://www.amazon.co.uk/dp/B00A2KY3KG )

Apparently, rivnuts can be fitted without a special tool.
( Like so: http://youtu.be/KeaMsvai0FA#t=2m42s )

However, I've been trying to decide which metal the rivnuts should be
made from. I've really no idea what I'm doing here. Rivnuts can be made
from aluminium, but surely that's too weak for fixing a security lock?


They can be zinc-plated steel like the one above but will that cause
galvanic corrosion of aluminium? I don't know. They can also be
stainless steel but isn't that even worse for galvanic corrosion of
aluminium?

Will they get wet? Dry joints don't corrode - or at least not at any
appreciable rate.