The Hobo Camp Fire Is going well #IX.. Stop In!!!

[ezdays]

Don most gun screws are called 6-40 . but that don't mean they all are there are off the top of my head  there are 10 different used screws used benign   sharp V, unified , Whitworth , modified square , acme , B&S worm , buttress  , knuckle , daroelet , metrics , us standard . there might be more but would have to dig out my machinist hand book . but my guess would be 6-40. and after you find a replacement i would use blue lock tight.
Jim

This one looks closer to #4 or M3 but with coarser threads. The gun is a month old, the easiest thing would be to just call Taurus and have them send me a replacement. I will Locktite it in since it's not a sight adjustment screw. I will stop by Ace though, just to see what they have there.