Matine Grade metal
The fittings such as screws, nuts, bolts, clams and nails that hold the frames together is made of stainless steel 316L, which is the lower carbon version of SS316.
Highly resistant to corrosive environments and elevated temperatures. The best option for high stress areas.
Njord also offer SS317, which is more resistant to sodium hydroxide found in the soaps and detergents used to clean onboard.