Swivel Chair Replacement Parts
Metric leg bolts and Dowel screws
Hanger leg bolts are what is commonly used on screw-on couch type legs. If the threaded portion protruding outwards from the old leg has Metric threads, none of our replacement legs will fit.
You will know if they are metric while attempting to replace, as the fastener hole in the couch/sofa may seem a little too large and will not screw in properly. You could replace the leg U.S. standard 5/16" hanger bolt with a metric sized one...if you can locate one.
A simple option is to remove the 5/16" hanger bolt from the new replacement leg and replace it with a dowel screw 
(the same hole will work). Then, after predrilling a 3/16" hole in the couch frame 3/4" or more away from the original hole, simply screw in the replacement leg. When tightened up flush against the couch/chair frame, it will be strong.
This is how to remove any hanger bolt. Do one of the following.
- Place the threaded portion into a machinist vice and tighten. Then twist the leg counter clockwise. Discard the metric hanger bolt. To install the new dowel screw into the leg, see Dowel Screw installation within.
- Use a Vice grip pliers and twist the bolt and the leg in opposite directions. To install the new dowel screw see Dowel Screw installation within.