Why you should only use stainless steel fastners

[mosquito13]

Rotted one on rear of bunk supports. Four years old. Not to mention what galanized fastners do to all aluminum they touch. Not worth the cost savings. 2nd pic galvenized ubolt reaction to aluminum beam.
[url=https://postimg.org/image/5fg0h9mp57/[/url] black backeound... Reduced in diameter by half and i didnt on it to find good metal.

[Juan]

Rust is inevitable if you boat in or near saltwater. It's going to happen unless your trailer and it's hardware is 100% stainless, aluminum or powder coated. Does anyone make a rustproof trailer?

[mosquito13]

Axle, hubs, tongue have to be steel for its properties. I am a big proponent for s/s hardware. The bunk bolts rot was not visible. If you got a aluminum frame the galvanized fitting don't need to rust to degrade the alloy.  Here the U Bolts look good with white chalky material underneath ...  Here is the science of it  www.galvanizeit.org/design-and-fabrication/design-considerations/dissimilar-metals-in-contact