found a tube

In the plumbing section of Home Depot I was thrilled to find a small copper coupling. It was in the bin labelled 1/4-inch but the coupler fits nicely over the shank of of a 3/8" bolt. Yes! A small pleasure. Aside from real Teflon, that might be the last bit needed for the Dobsonian base project. This will serve as a robust bearing, made of metal, in the azimuth pivot between the rocker box and ground plate.