I am looking for pop rivets, also known as tucker rivets or blind rivets.
The spike can be in 304 or 316 stainless but the head have to be monel if fitted to an alu mast.

I stripped clean two Tornado mast sections today. Amazing the amount of hardware in stainless there is on a mast.


I think the trees would be OK as long as the frost did not stay for long. It takes a while for the frost to reach below ground level.