If your chair is a little wobbly but you can't tighten the bolts and screws more, a dab of wood glue can help make it sturdier. If the fasteners continually loosen, glue can prevent that as well.

and Ikea furniture. This screw is stable and very uniform with both a Phillips and flathead driver fitting in it to tighten and loosen. The screw is for moderate applications as drivers often slip ...