Up for sale here is this set of 4 vintage large metal thumbscrews, most likely from the 1950s. You can use these to put together a really solid tube amp chassis--they will let you bolt down a huge top panel or something. These do have light to moderate wear and some light rust. The tops can adjust up and down. Dimensions are in the photos. Please see my pictures for details.

US shipping and handling is $5, and international is $18. If you have any questions, please ask.

I have other hardware and vintage electronics listed--feel free to take a look!