4
votes
1answer
113 views

Is it better to use two nuts, rather than a single long nut on the bolt?

Working on the roof, several J-bolts appeared to have been fastened with more than a single nut. Without exception each such bolt was almost flush to the cement sheet. I saw this done on a car wheel ...
1
vote
1answer
390 views

Washer / spacer for round surface

I would like to bolt a bracket to a steel pipe (1.5 inch diameter), with the nut located inside the pipe. Since the application needs to support a considerable amount of weight, I need some kind of ...