Factory Bed Rails bolts - Inexpensive options

I searched the forum and didn't see this anywhere, so I figured I'd share.

My Tundra came with the factory bed rails. Turns out, you can go to Lowe's, grab a 1/2" carriage bolt (I used stainless steel) [ https://www.lowes.com/pd/Hillman-1-2-in-x-1-1-2-in-Stainless-Steel-Carriage-Bolt/3056689 ], a thick fender washer and a 1/2" nut, and you have a bolt mount for your bed rails. I had to grind the head just a bit to take an edge off (the head was about 1/16" too wide to fit in the channel), but they grab pretty darn well.

I plan to use these to mount my antenna mount for my ham radio antennas to the bed rail.

I wouldn't trust these for any major weight distribution, but for little lightweight, just hold a bracket or 2, not a bad deal.