5mm I think I used a time sert repair kit they are like 40-60 bucks depending on what size you want all the huskys form that serieres take that size I think If you have mutli husky in that time frame era I would just buy the kit much easier down the road
m5x 0.8 time sert kent moore SPX Model # J-42385-3050 is the part number off of my kit that is: inserts (10 pc??) drill, tap, installation tool. ive done a few myself and it pretty easy