I would put some silicone on the gasket, assuming it has one. Also make sure you don't overtorque the bolts holding the pan. It doesn't take much to get them tight. We used to carefully check the threads on the drain plugs. You can tell when they have been overtorqued. The threads will show the damage before it gets critical. We stocked the drain plugs and copper washers and replaced them regularly, but I can't remember ever stripping one. Always threaded them in by hand until the washer contacted the pan. If they wouldn't thread in by hand they were on their way to being stripped. I used a box end wrench and my open hand to get them tight. Never had a problem.
regards
Mech
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