The only hardware that will not Rust over time is Stainless Steel Hardware. If you want your DIY Unistrut Roof Rack to last make the right choice. Going with standard coated hardware can eventually lead to rust problems and rust dropping onto the roof of your van.
Qty 5: 5/16-18" Spring Nuts for 1-5/8"x1-5/8" Unistrut
Note: Spring nuts for low profile Unistrut can be ordered upon request.