Boat Flooring Options Redone: I'm Replacing The Floor In My Smokercraft And Need Advice On Type Of Fastener To Use! Thanks..?

Redone: I'm replacing the floor in my smokercraft and need advice on type of fastener to use! Thanks..? - boat flooring options

My 20 years Smokercraft hulk rotting floor. I changed the floor and carpet. Now I need to replace the good life and side seats. There are holes dug where I, the old rivets. Locted enough water level, but what can I replace them?
I've heard that the use of the mother and screws enough to perhaps use silicone or rubber washer.
I've heard that the rivets are good, but expensive that for someone who will do it for me and gave me the weapon was used, with rivet holes in it anyway ... duh.
Nuts Another possibility was given as nylon. What do you think?
I can not wait to be on the lake!
Thanks in advance!
Rhonda