The hanger bolt screws into the base of a sofa, couch, chair or divan. Some type of T-nut is affixed to the base which accepts the hanger bolt. A T-nut is a type of locknut used to fasten a sofa leg. It has a long, thin body and a flange at one end, resembling a T in profile. The flange has spikes that sink into a wooden base of the couch, preventing the nut from turning.
To replace a missing or damaged T-nut, re-insert into previous hole or drill a hole and hammer it in place over the hole so that the threaded part is inside the hole. Should the t-nut hole be damaged or got larger over the years and no longer holds the t-nut in place, you may want to consider the T-Plate.
T-Plate sofa leg attachment plates are designed as an alternate method of attaching hanger-bolt style sofa legs. They are placed over the worn-out t-nut hole, screwed into the frame sofa frame and the leg can then be screwed into the plate. See pictures on the left. Sold in sets of 4 so you can replace t-nuts in pairs to keep the sofa square.
If your sofa leg came off and the hanger bolt is still in the sofa or chair, you'll need to remove it to replace the sofa leg. Hanger bolts are attached to the leg, not to the sofa.
The typical t-nut and hanger bolt is 18 threads x 5/16" diameter. If you have something different or measures approximately ⅜" it is probably a 10mm metric size. No worries, we have metric sizes.
Click here for a complete selection of sofa legs and feet with hanger bolts.