I would take some wooden bbq skewers and wood glue and put a few of them in the holes. This will effectively make the hole smaller.
Alternative is to drill the hole out enough so it can tightly accommodate a wooden dowal. Once that is glued in place, you can drill the proper size hole for your lagbolt.
AlderMaggotbone t1_j2akidd wrote
Reply to Stripped Swing Set Lag Bolts by elpuppetmaster
I would take some wooden bbq skewers and wood glue and put a few of them in the holes. This will effectively make the hole smaller.
Alternative is to drill the hole out enough so it can tightly accommodate a wooden dowal. Once that is glued in place, you can drill the proper size hole for your lagbolt.