These legs are a little taller. They worked well for me. You might have check to make sure the bolts fit your plates.
The top diameter is 1.38".
Hello Joe, I’m Chris from the Home Depot’s how-to Community. Thank you for your question. In terms of a dead downward load of 100 pounds you will have no problem. However, you will need to properly brace these legs so that side loads can be handled, such as when you dog jumps up on the bed. This bracket will help stabilize the legs from side shear forces. http://www.homedepot.com/p/Waddell-Heavy-Duty-Top-Plate-2755/100390125 I hope this helps, Chris. .
Eemaz, These legs can be mounted with anything that is compatible with a 5/16-18 hanger bolt. Thank you